Emergency workers were searching Sunday for the pilot of a helicopter that crashed on the shores of the Gulf of Finland outside St. Petersburg, leaving three people injured, officials said. The AS-355 helicopter belonging to Balt Avia went down around 6:30 p.m. (1430 GMT) Saturday about 75 kilometers (45 miles) west of the city, said Viktor Beltsov, spokesman for the Emergency Situations Ministry. A crew member and two passengers were injured and rescuers were searching for a pilot. One passenger was unharmed, Beltsov said. The official said the cause of the crash was being investigated.