One person has been killed after an oil tanker exploded following a head-on collision near the Swaminarayan tunnel on Nairobi’s Southern Bypass.

Lang’ata Sub-County Police Commander Pius Mwanthi said on Saturday that the deceased was one of the truck drivers involved in the crash.

Police officers and other emergency responders are still clearing the scene and keeping members of the public away, Mwanthi told The Standard, citing the risk of a secondary explosion caused by spilled oil.

As at 1.00pm on Saturday, one body had been retrieved from the scene.

As of 3:30pm, The Standard had independently confirmed the rescue of one other driver who was taken to hospital and that three other vehicles caught fire.

One body retrieved from the petrol tanker and lorry crash on Nairobi’s Southern Bypass near Swaminarayan tunnel.

Video by Ogina Elvis pic.twitter.com/yb99b7tMZh

— The Standard Digital (@StandardKenya) January 24, 2026

According to John Otieno who witnessed the accident, the oil tanker lost control before colliding head on with the other truck.

The Kenya National Highways Authority (KeNHA) has temporarily closed the Southern Bypass, to facilitate emergency response.  KeNHA has further warned of traffic delays, and advised motorists to use alternative routes.

“Traffic disruption is expected to continue until the situation is fully brought under control,” the Authority said, adding that the oil spillage presented a significant fire and explosion risk.

“Motorists are urged to strictly follow directions issued by traffic police and emergency responders.”

Additional reporting by Wanjiku Wanjiru.