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Pro-Gaza US protesters in New York's Columbia University say they will stay put despite the university's harassment and police crackdown.

The protesters said they refuse to concede to "cowardly threats and blatant intimidation" by university administration, asserting that they will continue to peacefully protest.

Columbia University threatened the students with the national guard after refusing to bargain in good faith.

The university announced a midnight deadline for talks regarding the removal of pro-Palestine encampments on the varsity campus, warning that their campsite will be forcefully cleared by police if no agreement is reached.

The university campus is being used as a campsite for hundreds of pro-Palestine protesters and other activists, who have gathered and set up numerous tents.

Pro-Palestinian protests at colleges have demanded that their universities divest from corporations doing business with Israel or profiting off the war in Gaza. At Columbia, protesters have also asked the university to end a dual-degree program with Tel Aviv University.

The deadline was announced by Columbia University President Minouche Shafik late Tuesday, as authorities across major American universities have launched their repression campaigns against the pro-Palestinian protests on campuses, amid rising anger over US's support for Israel. 

Shafik has issued a midnight deadline to protesters and organizers, warning that failure to comply will result in the forcible clearance of the camp by the New York Police Department (NYPD).

The university has engaged in discussions with student leaders behind the protests, which are part of a series of protests taking place at various colleges nationwide and resulting in multiple arrests.

The purpose of these talks is to address the encampment on the west lawn of Columbia's Morningside Heights campus.

American universities are grappling with the challenge of maintaining a delicate balance between the right to protest and freedom of speech, while also ensuring campus rules and safety, as tensions surrounding the ongoing war in Gaza continue to permeate across campuses.

Meanwhile, Shafik underscored the importance of free speech and the right to demonstrate, but highlighted significant safety issues, disruptions to campus activities, and a strained environment due to the encampment. She firmly stated that any form of intimidation, harassment, or discrimination would not be accepted.

The arrest of more than 100 protesters at Columbia University last week led to more campus demonstrations, at New York University, Yale, and the University of California, Berkeley.

Palestinian university professor Sami al-Arian said what is happening across US university campuses is unprecedented.

Al-Arian said, "I lived four decades in the US, 28 years of which were in academic settings. During my time, it was a very challenging struggle to present an anti-Zionist narrative."

"But the passion, courage, humanity, creativity, and determination displayed these days by students across US campuses make me proud. The Zionist grip on US society is weakening and waning."

Congress workers protested outside the home of Nilesh Kumbhani, the party's candidate from Gujarat's Surat Lok Sabha seat whose nomination form was rejected due to alleged discrepancies, as he was likely to join the BJP, sources said on Tuesday.

The protest came a day after the BJP's Mukesh Dalal was declared the winner from the party stronghold following the withdrawal of all the other eight candidates in the fray.

The sources said that the protesters called Kumbhani a "traitor" and "killer of democracy", adding that he could join the BJP as early as this week.

Kumbhani's nomination form was rejected after he was unable to present even one of his three proposers before Returning Officer Sourabh Pardhi.

The BJP had raised questions about the discrepancies in the signatures of three proposers in his nomination form.

The nomination form of Suresh Padsala, the Congress' substitute candidate from Surat, was also invalidated, pushing the party out of the poll fray in the BJP stronghold.

In his order, Pardhi said the four nomination forms submitted by Kumbhani and Padsala were rejected because at first sight, discrepancies were found in the signatures of the proposers, and they did not appear genuine.

The Lok Sabha elections in the Surat seat was supposed to take place on May 7.

Mangaluru International Airport (MIA) has taken a step towards enhancing aircraft safety and has planned to install a Precision Approach Lighting (PAL) category 1 system near Sri Kordabbu Daivasthana, Unile.

The groundbreaking ceremony was held on Friday. The project involves various works related to the PAL system and aims to be completed in 20 months.

The airport has undertaken this project in accordance with safety recommendations from the ministry of civil aviation and the civil aviation safety and security regulator. The PAL CAT 1 system will provide pilots with improved visibility of runway 24 and guidance during their final landing approach. The system will be installed 900m from the threshold of runway 24, as this end of the runway accounts for 90% of aircraft landings at the airport.

The PAL will be mounted on approximately 18 lattice structures, which is a unique feature of the project. The lights will be fixed to frangible T-shaped structures. The project will complement the installation of runway centerline lights, which has already been completed and is awaiting approval from the Directorate General of Civil Aviation for commissioning.