Two Hong Kong government officials charged over the city's worst maritime disaster in four decades, which claimed 39 lives, will go on trial in late May, reports said Wednesday.

The case follows the jailing of two boat captains for the 2012 collision between a high-speed ferry and a pleasure boat following a gripping 60-day trial.

A boat carrying at least 10 people thought to be illegal immigrants has sunk off the coast of Macau, authorities said Friday, with the rescue operation hampered by strong currents.

Macau's marine department said that four people had managed to swim to safety but the rest were missing.

A Hong Kong boat captain was on Monday sentenced to eight years in prison for the manslaughter of 39 people in a 2012 ferry collision, the city's worst maritime disaster in nearly four decades.

Sea Smooth skipper Lai Sai Ming, 56, was found guilty on Saturday following a trial that gripped the city, over the accident between his high-speed ferry and a pleasure boat near Lamma Island.

Police in the Chinese gambling enclave of Macau have busted a major prostitution ring and arrested more than 100 people, including the nephew of gaming tycoon Stanley Ho, city authorities said Tuesday.

The syndicate sourced prostitutes online, mostly from mainland China, to solicit at a Macau hotel, turning an estimated annual profit of 400 million patacas ($50 million), Vong Chi-hong, spokesman for the city's Judiciary Police told Agence France Presse.

President Xi Jinping visited a drizzly Macau on Friday for the 15th anniversary of the gambling hub's return to Chinese rule, with onlookers barred from using umbrellas -- the emblem of democracy protests in nearby Hong Kong.

The two-day trip to the former Portuguese enclave comes just days after Hong Kong police cleared the last of three camps where protesters had spent nearly three months demanding free leadership elections for the city.

Macau re-elected its incumbent leader in an unchallenged contest Sunday as the gambling hub faces growing calls for democracy amid anger over deteriorating living conditions and government accountability.

The booming city's sole chief executive candidate Fernando Chui was voted in for a second term by 95 percent of a 400-strong pro-Beijing electoral committee, in a foregone contest which democracy advocates have called "ridiculous".

Four people were arrested as police shut down voting facilities in Macau after activists ignored strong objections from Beijing and held an unofficial referendum on electoral reform, the event organiser said.

More than 50 people were injured when a Hong Kong ferry crashed into a seawall off the coast of the gambling enclave of Macau Friday, officials said, the latest accident to hit the cities' busy waterways.

The crash happened when the Macau-bound ferry -- reported to be a jetfoil boat -- was approaching the port at around 9.30 am (0130 GMT) and hit a concrete breakwater, a spokesman for Macau's marine department said.

Casino bosses and pro-Beijing candidates dominated poll results in the Chinese gambling enclave of Macau, with democrats conceding defeat on Monday.

Sunday's polls were marred by reports of perks offered to voters during last-minute campaigning in a city which has been transformed by the gambling industry.

Italian fashion house Versace says it has signed a deal to build a luxury hotel at a casino-resort in Macau, the world's top gambling market.

Versace and Macau casino operator SJM said in a joint statement Tuesday that the Palazzo Versace hotel will be part of the resort SJM is building in the former Portuguese colony.