An 18-year-old Chinese student, who was kidnapped for four days in Vancouver, has been rescued unharmed and five men have been arrested, authorities said Thursday.

The investigation into the kidnapping is still active, Deputy Chief Doug Lepard said in a news release.

Canadian police notified the Chinese Embassy in Canada of the successful rescue, said Consul General Li Guixi.

The student, from China's northwestern Xinjiang Uygur Autonomous Region, was kidnapped from his residence in Vancouver on Feb. 15.

The kidnappers later telephoned the student's family members several times, demanding ransom, said the Canadian police.