All flights were halted in and out of Boston Logan International Airport on Thursday, the airport’s operator said, after a JetBlue plane veered off the runway upon landing.

The plane, JetBlue Flight 312, rolled into a grassy area off the runway, a spokeswoman for the Massachusetts Port Authority, Samantha Decker, said in a statement. There were no injuries, and passengers were being transported to the terminal, she said.

The runway will be closed while the aircraft is being assessed, Ms. Decker said, with a ground stop expected to be in place until 2 p.m. Eastern.

“No planes are currently taking off and aircraft coming to Boston are being held at origin airports,” she said. The stop could lift earlier “depending on when the aircraft is removed from the airfield,” she added.

Photos of the plane shared online show the JetBlue plane parked in a grassy area, surrounded by emergency crews and trucks.

It was unclear what had caused the mishap involving the flight, which departed at 8:41 a.m. Central from Chicago O’Hare International Airport. It landed at 11:49 a.m. Eastern in Boston, according to flight trackers.

In a brief statement, JetBlue said that the plane had “veered off the runway.”

“Safety is JetBlue’s top priority,” the airline said. “We will conduct a full investigation of the incident and will work closely with the relevant authorities to understand the cause.”