Ali Aftab, a resident of Lahore said he heard a “buzzing sound” followed by an explosion around 7am, Reuters reports.

“Immediately, I rushed to the rooftop and saw smoke rising…the area was cordoned off by security forces soon after the incident,” he told the media agency.

The Indian defence ministry did not immediately respond to a request for comment, but an Indian defence official, who did not want to be named, said there were no Indian operations underway in Lahore.

The cross-border exchange of fire in Kashmir tapered off slightly overnight, Indian officials said.