NAIROBI, Nov 8 (Thomson Reuters Foundation) - Ten men arrested for being involved in homosexual activity in Zanzibar were released on bail on Thursday, said a senior police official and their lawyer, adding that the incident was still being investigated and the men could be charged in the future.

Homosexual acts are illegal in Tanzania and its Indian Ocean archipelago of Zanzibar. Male offenders can face up to 25 years in jail on the tropical island which draws hundreds of thousands of tourists to its palm-fringed beaches annually.

The men were arrested late on Saturday when police raided a party at a beach resort on Zanzibar's main island Unguja following a tip-off that a gay marriage was taking place.

"We have been investigating this case as it was reported to us, but we have so far found no evidence of unlawful acts so we are releasing all the men," said Suleiman Hassan, Unguja South's regional police commander.

"We are however continuing our investigation and if we find evidence, they could be rearrested and charged," he told the Thomson Reuters Foundation by phone from Unguja. Read more via Reuters