A man in Pennsylvania has been arrested after allegedly plowing his car into a community event, killing one person and injuring 17 others, before driving off and fatally beating his mother in a nearby town, Pennsylvania State Police said in a press release Sunday.

The latest: The alleged assailant was identified as Adrian Oswaldo Sura Reyes, the Luzerne County Coroner’s office told ABC News. His mother's autopsy showed that she was hit by a car and assaulted with a hammer, ABC News reported.

Driving the news: Community members in Berwick, Pennsylvania, were holding an all-day fundraiser on Saturday to benefit the victims and families of a deadly house fire in nearby Nescopeck this month, WNEP-TV reported.

• Shortly after 6pm, a man drove his car into the crowd of people gathered at the event. Police arrived on the scene to discover one person dead and 17 injured, per the press release.
• A short time later, police received a call that a man in the Nescopeck borough of Luzerne County had been spotted physically assaulting a woman. Upon state troopers' arrival on the scene, they discovered the woman was dead and the man had been detained by municipal police, the press release said.

The big picture: Reyes, 24, of Nescopeck, was identified by police on Sunday afternoon and authorities noted that he is a suspect in both cases.

• Reyes was arraigned on Sunday on two counts of criminal homicide and denied bail.
• "These investigations are very active," Pennsylvania State Police said in the press release but gave no further details.
• Information on the victims and the injured — who have been taken to various local hospitals — is not being released at this time.