OAKLAND, Calif. (AP) — Officials say two Southwest Airlines flights made emergency landings at Oakland International Airport within a two-hour span.

A Denver-bound flight from San Francisco with 143 passengers on board landed Tuesday in Oakland shortly before 8 a.m. because of cabin pressurization issues. Those passengers and the flight crew eventually boarded another flight.

Almost two hours later, reports of smoke in the cockpit forced a Reno-bound flight from Oakland to land just moments after taking off.

It was not immediately known if those 119 passengers on board got on another flight.

Rescue and fire crews stood by for both emergency landings. No injuries were reported.

An Oakland Airport spokeswoman says airport operations ran normally despite the multiple incidents.

(© Copyright 2012 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)