Kevin E. Schmidt / Quad-City Times via Zuma Press A fireball rises after a Soviet-era Czech L-39 military training jet with the Hoppers Flight Jet Team crashed, killing the pilot during the Quad-City Airshow on Saturday.

Jeff Cook / Quad-City Times via Zuma Press

Corporal Jacob Pries of the Davenport Police Department said the accident involving the L-39 jet, developed in the former Czechoslovakia in the late 1960s, occurred about 1:30 p.m. during the annual Quad-City Air Show.

The jet was flying in formation shortly before it crashed alongside the I-80 highway. It plowed into a field near the Eastern Iowa Industrial Center in northern Davenport, Fries said.

-- Reported by Reuters

Read the full story.

A jet crashed, Saturday, at the Quad City Air Show in Iowa. NBC's Lester Holt reports.

Follow @msnbc_pictures