Four people were hurt, including a Prince George’s County police officer, in a chain-reaction crash in the Bladensburg area Saturday afternoon, authorities said.

The incident occurred about 4 p.m. in the 5100 block of Annapolis Road, authorities said.

Officer Harry Bond, a Prince George’s police spokesman, said the crash was triggered when a vehicle headed west stopped suddenly, forcing an officer driving behind it to slam on the brakes. The officer’s vehicle stopped, but another vehicle rear-ended it, causing a three-car pileup, Bond said.

Bond said it appeared preliminarily that the driver of the third vehicle made no attempt to stop.

Two people in the first vehicle, the officer and the driver of the third vehicle were all taken to the hospital with injuries thought to be relatively minor, Bond said. He said investigators were probing what caused the first vehicle to stop and who was at fault in the crash.

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