Two planes make precautionary emergency landings on Monday night

Two Delta Airlines flights made unplanned landings Monday night in unrelated incidents.

A Delta flight from Atlanta made an emergency landing at Tri-Cities Airport in Washington state after a false alarm with one of the plane’s cargo bay sensors on Monday night.

The plane was carrying 183 passengers to Seattle when it made the emergency landing, according to local NBC News affiliate KNDU. The flight's captain said that there was no fire on board the Boeing 757, the station reported.

An indicator light in the plane’s cargo bin went off, Delta Airlines spokeswoman Sarah Lora said on Tuesday. The plane landed as a precaution, she said.

No one was injured in the incident and another plane took the passengers of Flight 2329 to their destination early on Tuesday morning.

In a separate incident on Monday night, a Delta flight to Atlanta returned to Syracuse’s Hancock International Airport after smoke was seen in the area of a coffee machine.

The aircraft’s pilots said there was no indication of any additional fire aboard the plane, according to air traffic control recordings. A smoke extinguisher was used after smoke was spotted “coming from a coffee pot,” a pilot says in the recordings.

None of the plane’s 121 passengers were injured in the incident, according to the Delta spokeswoman. A flight arrived in Atlanta at about 1:40 a.m. local time on Tuesday, according to Delta’s website.

NBC News’ Jay Blackman contributed to this report.