KUALA LUMPUR: A tuition teacher has been arrested to assist investigations into sexual assault and unnatural sex involving five male pupils.

City police chief Datuk Fadil Marsus said the offences took place at the suspect's house, which was also used as a tuition centre.

He said police had received five separate reports involving teenage and child victims, all lodged at the Bukit Jalil police station.

"The first police report was lodged on Oct 6, followed by a second on Oct 10, while three more reports were received on Oct 11," he said in a statement.