December 6, 2012 -- Updated 2247 GMT (0647 HKT) A red buoy marks the spot where the cargo ship "Baltic Ace" sank in the North Sea after colliding with a car carrier, December 5. NEW: Search is called off for crew members missing after a ship collision Wednesday evening NEW: Passing ships have been told to be on the lookout, Netherlands Coast Guard says The Baltic Ace began sinking immediately after the collision (CNN) -- The search for the missing crew members from a North Sea cargo ship collision has been called off Thursday afternoon, the Netherlands Coast Guard said in a statement. The search will not be resuming and passing ships have been told to be on the lookout, the Netherlands Coast Guard said. At least four people are dead and seven others missing after a container vessel collided with a car carrier Wednesday evening, the Netherlands Coast Guard said. The carrier Baltic Ace began sinking immediately after it collided with the container vessel in a busy shipping lane, about 60 kilometers (32 miles) west of Rotterdam, according to Coast Guard spokesman Peter Verburg.