Partner of journalist at center of NSA leak detained for 9 hours at London's Heathrow Airport

British authorities detained the partner of a journalist who received leaks from former National Security Agency contractor Edward Snowden for just under nine hours under the Terrorism Act.

David Miranda, the partner of Guardian reporter Glenn Greenwald, was detained under Schedule 7 of the Terrorism Act, which allows security agencies to stop and question people at borders.

Miranda, who was returning to home Brazil from Germany, was detained at Heathrow Airport and released without charge Sunday. Greenwald says that Miranda's cellphone, laptops and memory sticks were confiscated.

London police acknowledged they had detained a 28-year-old man at 8:05 a.m. He was released at 5 p.m. without being arrested.

Greenwald has written a series of stories about the NSA's electronic surveillance programs based on files handed over by Snowden.