Police officers conduct a manhunt after a mass shooting in San Bernardino, California December 2, 2015. (Mike Blake | Reuters)

The FBI announced Friday that it had taken the lead role in the investigation of the San Bernardino shooting, and that it would investigate the attack as an act of terrorism.

David Bowdich, from the FBI’s Los Angeles office, said in a Friday afternoon news conference that investigators had uncovered “telephonic connections” between the two shooters and other subjects

As many as three people opened fire at a center for people with developmental disabilities in San Bernardino, Calif., on Wednesday, killing at least 14 people and injuring 14 others in what the city’s police chief described as an act of domestic terrorism.

The active shooting scene erupted at the Inland Regional Center, which serves people with developmental disabilities in Riverside and San Bernardino counties.

The person or people who opened fire fled the area, possibly in a dark SUV, and au