Hong Kong police have arrested 10 people who were allegedly plotting to make bombs ahead of this week's Legislative Council vote on a universal suffrage package, a media report said on Tuesday.
The suspects -- six men and four women -- aged between 21 and 58 were arrested on Monday night, police said.
Some of the suspects claimed they were members of a local radical group.
The police found maps marking locations in downtown Wan Chai and Admiralty.
"The group might have wanted to do something on those particular locations," a security official said.
The police seized explosives at one suspect's home, which were confirmed to be ingredients for triacetone triperoxide (TATP), a highly explosive substance that was used in 2005 London bombings.