File photo of the marine surveillance helicopter. [Photo/huanqiu.com]

Four people died when a marine surveillance helicopter crashed on its way back to base in east China's Zhejiang Province on Tuesday.

The helicopter, coded China Marine Surveillance B-7115, was on a regular patrol on Tuesday before it went missing at 1:26 p.m, according to the East China Sea Branch of the State Oceanic Administration.

Helicopter wreckage was found on Daqingshan Mountain in coastal city of Zhoushan.

The victims were two plane crew and two marine law enforcement staff.