A WOMAN has been arrested following an armed robbery.

Officers were alerted to an intruder alarm being activated at a pharmacy in Durlston Drive, Bognor, at 9.11am today.

A woman entered the premises equipped with a knife and a gun and demanded medication from the staff before leaving.

She is 5ft 5in, of medium build and was wearing blue jeans, a dark coloured jacket with an orange emblem on the left arm and a black balaclava.

No injuries were reported from the incident.

A 29-year-old woman from Bognor was arrested on suspicion of robbery.

She remains in custody as of Tuesday afternoon and the investigation is ongoing.

If you witnessed the robbery or walked passed the suspect please report information via email or by calling 101 quoting 281 of 11/12.