Kollam (Kerala) | An explosive substance was thrown at the office of a TV channel here on Sunday morning, police said.

According to police, CCTV visuals of the area and the channel's office showed two persons arriving there in a two-wheeler and one of them throwing a flaming bottle at the building.

Police said that two journalists were sleeping in the channel's office when the incident occurred around 3 am and did not hear what had happened.

Later in the morning, when a driver employed by the channel reached there, he noticed that one of the steps of the building's staircase was burnt and pieces of the bottle lying there, police said.

Subsequently, he informed the journalists in the office and then the police were informed, it said.

Police said that statements of the journalists and the driver were being recorded and then a case will be registered.

The contents of the bottle will be known only after a forensic examination, it said.