A man was killed this morning in Burbank after he jumped off the Olive Avenue overpass and was hit by an oncoming tractor-trailer on the southbound Golden State (5) Freeway, police said.

The man, whose identity wasn’t immediately known, was struck in No. 4 lane about 9:20 a.m., according to Burbank Police Lt. Matthew Ferguson.

A Sigalert was issued at 9:43 a.m. after the three right lanes of the southbound I-5 were closed for the investigation, with traffic stopped from Hollywood Way.

Police were directing traffic and stopped westbound access to Front Street, Ferguson said. Police also blocked the Front Street entrance to the freeway.

-- Veronica Rocha, veronica.rocha@latimes.com

Follow on Google+ and on Twitter: @VeronicaRochaLA.