[Update 2:48 p.m. ET] A light aircraft with landing gear problems landed intact Monday afternoon at St. Louis-Lambert International Airport.
CNN affiliate KTVI said eight people were aboard the Learjet.
Officials earlier said that they expected the plane to touch down at St. Louis Downtown Airport, which is across the Mississippi River from St. Louis in Cahokia, Illinois.
The plane landed "without incident" at 1:32 p.m. CT (2:32 p.m. ET), the Federal Aviation Administration said. It had departed Wooster, Ohio, en route to St. Louis Downtown Airport earlier in the day.
[First report 1:53 p.m. ET] A light aircraft reporting landing gear problems is preparing to make an emergency landing at St. Louis Downtown Airport - also known as Parks Airport - in Cahokia, Illinois, according to CNN affiliate KTVI.
Just before noon, the plane reported a problem with its landing gear, KTVI reported.
This is a developing story. We'll bring you more details as we get them.