US media have reported a shooting at a shopping mall in Pennsylvania.
The shooting took place at Park City Mall in Lancaster, Lancashire, according to ABC News.
In a video posted on social media, people are seen fleeing the mall and going to safe places.
Police said several people were injured, but did not say how many were injured, and said none of them were in critical condition.
Pennsylvania police also said they had arrested several people but did not say whether the perpetrator or perpetrators were among them.
The mall is currently closed and police are investigating the incident.