A fifth shot himself to death in the motor home after officers had tried to talk him into surrendering.
All ships were named after Dutch naval officers.
They were all named after directors and senior officers of the railway.
One after another crewmen and officers were leaping off the wing into the water.
The police were also accused of using excessive force last August after officers subdued two people who led them on a chase through rush-hour traffic.
A police patrol car also became a casualty after officers attempted to help stranded motorists.
They were named after governors, brigadiers and high-ranking officers.
The governor also recounted the tale of one man who was searched, but was released after officers found he had $100 in his pocket.
Protesters attacked the police with stones after officers used clubs, the Anatolia news agency reported.
Many streets in the area are named after World War 1 battles and officers.