Portions of Canal Street and Tulane Avenue were closed down Tuesday afternoon as police investigated a shooting scene at one intersection and searched for some of the gunmen at another site following a vehicular chase.

Four people were arrested.

The incident began a little after 3 p.m. when gunfire erupted near a carwash at Tulane Avenue and South Jefferson Davis Parkway, injuring one man, said Officer Hilal Williams, a New Orleans Police Department spokeswoman. The victim was struck in the thigh.

Officers who were nearby when the shooting happened saw a vehicle speed away from the intersection and began to chase it, Williams said.

Two men hopped out of the car near Canal and North Cortez streets, a few blocks from the shooting scene, and were arrested there. A police dog found one of the two behind a home near the corner.

Two other people were arrested near Tulane Avenue and South White Street, said 1st District Commander Otha Sandifer.

Those arrested were not immediately identified.

The motive for the shooting remained under investigation late Tuesday afternoon, Sandifer said.

Follow Danny Monteverde on Twitter, @DCMonteverde.