Canadian tourists, business travelers and even some former Indian citizens are rushing to change flights and inquire about their trip deposits after India abruptly suspended visa applications in the country amid an escalating diplomatic row.

A day after the Indian government warned its citizens in Canada to "exercise utmost caution” and hinted that their safety is threatened, BLS International — an agency that processes visa requests in Canada — posted an online notice saying services have been "suspended until further notice.”

"This shouldn’t happen for the innocent people,” said Jothy Ilangovan, standing in line outside the BLS office in Toronto. She was there to help her brother, a Canadian citizen who has lived in the country for 33 years, obtain a visa for a Hindu pilgrimage back to India. He had already booked his vacation time from work and feared the trip would be canceled. "We want to go to the temple and pray, that’s it.”