At least 30 people were injured when two passenger buses collided in Gonahena this morning, the police said.Police Media Spokesperson ASP Ruwan Gunasekara said that out of those injured, three were in critical condition and had been transferred to the Colombo National Hospital. The remaining 27 injured had been admitted to the Horana Hospital by the local residents.Police have arrested the driver of one of the buses who had been responsible for the accident.Further investigations have been launched into the incident.