Fire boats and emergency vehicles search for missing tourists after a double-decker boat capsized in the Danube river in Budapest last night (May 29), with seven dead and 21 still missing.

Divers have also been sent to help with the rescue effort as boats docked on the river bank shined lights through heavy rain.

The boat had a capacity of 45, and sank around 10pm on Wednesday night.

Local news reported the boat had been hit by another tourist vessel and sank in just seven seconds according to a police spokesman.

With more than 34 people on board a boat flip into the water today after a boat capsized and sunk last night on Danube river in Budapest, many peoples died already, and other are still disappeared.