Two trains have collided head-on between Colombo Fort and Maradana railway stations this morning (28).Owing to the incident, commuting trains on the Main Line were disrupted, the Railway Control Room said. A Kalutara-bound train (No. 741) had collided head-on with another train (No. 412) which had set off to reach Chilaw from Colombo Fort.The engine driver, driver assistant and two train guards of the Kalutara-bound train, which was involved in a head-on collision with another train have been suspended from their duties. A spokesman for the Department of Railways said that the four employees have been suspended, pending an inquiry, for ignoring railway signals.However, no casualties were reported from the incident which had reportedly only caused minor damages to both trains involved.