BOSTON (AP) – British authorities early Thursday arrested a man in the shooting deaths of his wife and infant daughter, whose bodies were found in their Massachusetts home last month, officials said.

Neil Entwistle, who returned to his native England around the time his family was killed, faces murder charges, said Middlesex District Attorney’s spokeswoman Emily LaGrassa.

“He is in police custody in England at this time,” LaGrassa said Thursday morning.

London’s Metropolitan Police said Entwistle was arrested at a subway station on a provisional extradition warrant issued Wednesday evening. The British Home Office said he would be brought before a judge, but declined to say when that might occur.

Rachel Entwistle, 27, and 9-month-old Lillian, were found dead Jan. 22 in their home in the Boston suburb of Hopkinton.

A spokesman for her family declined to comment on the arrest Thursday but said they would release a statement later.

Police were first called to the Entwistles’ home the day before the bodies were discovered but didn’t see anything wrong, authorities said. District Attorney Martha Coakley has said that friends showed up for a dinner party but no one answered the door, and that Rachel Entwistle’s mother called police when she couldn’t reach her daughter.

After a missing person report was filed, police visited the home again. During the second search, they detected an odor and discovered the bodies in a bedroom. Coakley has said the bodies were covered by bedding and “almost not visible.”

Massachusetts authorities flew to London late last month to interview Neil Entwistle at the U.S. Embassy, but officials didn’t say whether he answered any questions. He had been labeled a “person of interest” at that point but not a suspect.

Neil Entwistle didn’t attend his wife and daughter’s funeral on Feb. 1.

The couple had met in 1999 at the University of York, where she was spending a year studying abroad. They married in 2003 and stayed in England until last year. Their daughter was born in April.

The family moved to Massachusetts, Rachel Entwistle’s home state, and had rented the Colonial-style home in Hopkinton about 10 days before she and her daughter were found dead.

Relatives told investigators Neil Entwistle was looking for a job in the technology field at the time. His wife had been a teacher but also was not working.