Police: San Bernardino shooters acted 'as if they were on a mission'
San Bernardino Police Chief Jarrod Burguan talks to the press on Dec. 2, 2015. [KNBC-TV]

San Bernardino Police confirmed on Wednesday afternoon that the suspected shooters in the attack on the Inland Regional Center were still at large, while also commenting on their demeanor during the incident.

"They came prepared to do what they did, as if they were on a mission," Chief Jarrod Burguan said during a press conference.

Burguan said that the suspects arrived with "long guns" but was not able to identify what specific firearms they carried. The suspects left the scene in a dark SUV, he added.

At least 14 people were killed during the attack, and another 14 injured.