A supply vessel collided with a barge at Indira docks here on Tuesday but there was no casualty. Mumbai Port trust officials said no vessel has capsized, nor were there any casualties. "A supply vessel came in contact with a barge carrying steel coils. The barge listed about seven degrees as a result," an official said. The incident comes in the wake of the collision of two ships off Mumbai coast earlier this month, which led to oil spill along the Konkan coast.