State Rep. Wendell Gilliard, D-Charleston, has asked for increased patrols and surveillance on Interstate 26 in North Charleston because of speeding and people getting shot while driving on the highway.

Since June of 2011, eight incidents involving gunfire on I-26 have occurred from near Montague Avenue to U.S. Highway 78. The shootings killed two people and left five wounded. Police have arrested one shooting suspect and have possible suspects in two other shootings, but the remainder are unsolved, police said.

Police do not think the shootings are random.

Gilliard said today in a letter to the state Department of Public Safety that he has observed people speeding on the interstate for the past five months.