Four senior police officers have been detained and 16 leading opposition figures charged with rebellion, in a crackdown against those allegedly plotting to topple the Philippines President. Chief Superintendent Marcelino Franco, who was sacked on Friday from his post as commander of the police Special Action Force, and three of his men "were placed under restrictive custody", amid reports they were recruiting people to destabilise Gloria Arroyo's government, national police chief Arturo Lomibao says. Chief Superintendent Franco was sacked when Mrs Arroyo declared a state of emergency to counter an alleged coup plot. At the same time, police filed charges of rebellion and coup d'etat against four leftist legislators and 12 other opposition figures who have called on Mrs Arroyo to step down. The head of police criminal investigations, Chief Superintendent Jesus Versoza, said his office submitted the names of the 16 to the Justice Department. Among those charged were leftist members of the House of Representatives Crispin Beltran, who was arrested Friday, Satur Ocampo, Liza Maza and Teodoro Casino, Chief Superintendent Versoza said. Also in the charge sheet was former senator Gregorio Honasan, who as an army colonel in the 1980s led several bloody coup attempts against the government. He remains at large.