Lawrence police were investigating the aggravated robbery of a pizza delivery driver on Sunday night.
Police about 9:35 p.m. were called to the area of 24th and Murphy Drive, where a male driver reported he was struck on the head with a brick by a woman.
She and two men then reportedly took four pizzas and the driver's money.
He had a minor head injury, authorities said.
The suspects ran south toward 24th Street, police said.
The robbery reportedly occurred after the driver had delivered a pizza in the area earlier in the evening.
Anyone with information about the robbery is asked to call Crime Stoppers at 843-TIPS (8477).