An oil tanker and a cargo ship collided off the coast of eastern England on Monday and a major rescue operation is underway, Britain’s coast guard said.

Several lifeboats and a coast guard rescue helicopter were dispatched to the scene in the North Sea, along with a coast guard plane and nearby vessels with fire-fighting capability.

BBC News reported that the oil tanker is on fire. The tanker, believed to be the U.S.-flagged chemical and oil products carrier MV Stena Immaculate, was at anchor at the time, according to ship-tracking site Vessel Finder.

The Maritime and Coastguard Agency said the alarm was raised at 9:48 a.m. local time. The site of the collision is off the coast of Hull, about 155 miles north of London.

This is a breaking news story. Check back for updates.