Four suspected robbers were injured in a reported gunfight with detectives during a robbery incident at a sweater factory at Kadda Islampur in Gazipur city early today.

A gang of robbers, numbering 15-16, entered the factory of 'Ocean Sweater Limited' around 2:30am with the help of a security gaurd, and looted valuables, including cotton and yarn, from the factory, said Iqbal Hossain, sub-inspector of the Detective Branch (DB) of police.

Later the robbers took the valuables into a covered van and left the scene.

On information, a team of Detectives intercepted the covered van and challenged the robbers.

Sensing danger, the robbers opened fire at police prompting them to fire back, triggering a "gunfight" that left four of the "robbers" injured.

The four --Mamun, 25, Sultan Uddin, 42, Abdus Salam, 40 and Hamidul, 30, hailed from Tangail, Dinajpur and Rangpur districts.

Police arrested the four robbers while the others managed to flee the scene with the looted valuables.

The injured "robbers", who are accused of several cases, rushed to Shaheed Tajuddin Ahmad Medical College Hospital, police said.