Police in Guangdong province have detained 910 suspects after busting 80 gangs they say were involved in telecom fraud, theft and robbery, in two crackdowns launched in late April and early May.

Many bank cards, cellphones and cash machines were seized, Zhang Rui, political commissar of the Guangdong Public Security Department's Criminal Investigation Bureau, said at a news conference in Guangzhou on Thursday.

"Fraudsters seize every opportunity to con their victims, and residents should improve their awareness to guard against being taken in by scams," he said. "Police will spare no effort to fight against these criminals."