Police in southern Greece say at least 20 migrant strawberry pickers have been shot and wounded in a pay dispute after a foreman opened fire on them with a shotgun.

The incident occurred Wednesday near the village of Manolada about 260 kilometers (160 miles) west of Athens.

Police Capt. Haralambos Sfetsos said most of the wounded workers were from Bangladesh. He said the shooting occurred when about 200 workers at the strawberry field demanded six months' unpaid wages and "moved threateningly" toward three foremen, at least one of whom opened fire.

The owner of the site, who was not present at the time, has been detained for questioning while arrest warrants have been issued for three foremen, who are all Greek.