Authorities in Massachusetts are searching for a second suspect in the deaths of a National Guard member and her 11-year-old daughter who were fatally shot inside their vehicle on Tuesday, Worcester police announced.

Karel Mangual, 28, was arrested in connection to the death of Chasity Nunez, 27, and her daughter Zella, both of whom were found inside their parked SUV with serious gunshot wounds, police announced. The two were immediately taken to the hospital where they were pronounced dead.

Mangual is charged with armed assault to murder and carrying a firearm without a license, police said. According to a separate release, another suspect, Dejan Belnavis, 27, was also involved in the incident but is on the run and should be considered armed and dangerous.