Two 17-year-old boys died Wednesday morning in an alcohol-related boat accident. Another boy and a girl also on board at the time survived by clinging to the vessel after it capsized.

The boat capsized at around 7:20 a.m. in Lake Kawaguchi in Kawaguchiko, Yamanashi Prefecture, according to the police.

Factory worker Tatsunori Kajiwara and part-time employee Takayuki Okuwaki went missing after the boat overturned, police said.

The four were among a group of nine who visited the lake. They had been drinking alcohol since Tuesday night.

Divers found the two in the lake about 1 1/2 hours later. They were pronounced dead shortly after they were rushed to a nearby hospital.

The four set sail at around 7 a.m., with the craft capsizing about 50 meters from the shore.