Activists who set sail for the disputed Diaoyu Islands were towed back to Hong Kong by a police vessel last night in a repeat of Wednesday's thwarted journey. The same boat, Kai Fong II - also known as the Diaoyu II - was turned back near Waglan Island on Wednesday, minutes before the activists would have left Hong Kong waters. Lo Chau, a core member of the Action Committee for Defending the Diaoyu Islands and owner of the Kai Fong II, said marine police officers at 10.20pm told the activists to return immediately to the Sai Wan Ho marine headquarters for questioning. Lo said the police vessel had been following his boat since it set sail from the Shau Kei Wan typhoon shelter at about 2pm yesterday. The police vessel began towing the activists' boat east of Waglan Island, about two nautical miles from the water border, he said, adding no arrests were made. The Marine Department declined to comment. Before it was towed, police boarded the boat three times, warning the crew to turn back, citing a marine law which bans fishing vessels carrying passengers from leaving Hong Kong. Earlier yesterday, the activists vowed renewed court action, saying the government is infringing their rights to free travel under the Basic Law. They say they will seek an injunction against any further obstructions as well as a judicial review. Lawyers helping the activists said the government was on shaky ground because the seven crew members on board were either genuine sailors or had sailing qualifications. 'We are now reviewing our case and it will be along the lines of a breach of fundamental rights,' said Democratic Party chairman Albert Ho Chun-yan, a lawyer. Tsang Kin-shing, a member of the Action Committee for Defending the Diaoyu Islands, said the application for a judicial review could be lodged as soon as today. The Court of First Instance in May dismissed an application for a judicial review of an earlier order by the government barring the activists from setting sail. Barrister Ronny Tong Ka-wah of the Civic Party said the government's action amounted to an abuse of the law, because even though the Marine Department director might have the power to stop any vessel leaving Hong Kong waters, it should not be based on political considerations. 'The Marine Department is not the political bureau, nor is it the Ministry of Public Security overseeing national security. It cannot just ban people from sailing for political reasons,' Tong said. Fisheries sector lawmaker Wong Yung-kan, of the Democratic Alliance for Betterment and Progress of Hong Kong, said the government had never used this law against genuine fishermen. Members of his party staged a rally in the newly renovated second world war memorial in Wu Kau Tang yesterday, urging the Japanese government to recognise the Diaoyu Islands as Chinese territory.