READING, Pa. - Four people have been shot at an eastern Pennsylvania strip mall barbershop where another shooting happened a day earlier.

Reading police Chief Robert Heim says one person has been critically injured in the shooting while the other three have suffered minor injuries. Authorities say no one is in custody.

The Reading Eagle newspaper says the shooting happened Wednesday afternoon at the All Stars Hair Salon and Unisex Hair Studio. On Tuesday night, a gunman fired several shots into the shop.

The newspaper reports nearly a dozen people were in the shop Tuesday but no one was injured. That shooting remains under investigation.