"In the two incidents between 10 to 15 people, Kuwaitis and Saudis, were arrested," Shaikh Nawaf al-Ahmad al-Sabah said on Monday. 

One Saudi fighter was killed and two Kuwaiti security officers were wounded in a shootout on Saturday, which came five days after two police officers were killed in clashes with armed men in the south of Kuwait.

Kuwait, where about 25,000 American soldiers are based, has been cracking down on activists opposed to the presence of US forces in the state.