Watch the moment police storm Sydney cafe; standoff over

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SYDNEY — Video footage that aired early Tuesday in Australia showed police officers trying to break into a building where several hostages had been held.

Australian special forces and police stormed the Lindt cafe in Sydney from two directions, and the hostage-taker was shot and killed, a national security source in the United States told CNN.

There were at least nine people in the building at the time, the source said.

The gunman was wearing a thick black vest and law enforcement was concerned it could contain explosives, the source said.

An ordnance team cleared the building and checked the gunman, the source said. No information was given on whether any explosives were found.