YAOUNDE, Feb. 2 (Xinhua) -- At least two civilians have been killed after terror group Boko Haram raided three communities in Cameroon's Far North region, security sources said on Monday.

The attack took place overnight into Monday in Ldama, M'lay and Houlva villages. A military official in the region said that the militants attacked a hospital, killing a security guard and a nurse.

"They also injured some civilians. People are terrified. We have deployed troops to the localities for investigation, and our brave soldiers are working to capture these terrorists," the official who asked not to be named told Xinhua.

Boko Haram has been operating in the region since 2014. The terror group is notorious for raiding civilian communities and kidnapping for ransom. ■