What was likely a festive mood on Jennifer Aniston's private jet headed to Cabo San Lucas quickly changed Friday after a mechanical issue forced an emergency landing in California. People reports that Aniston and nine other passengers were on their way to Mexico from Los Angeles to celebrate the star's 50th birthday when an issue was discovered with one of the tires on the Gulfstream plane's landing gear, per a statement from Ontario International Airport. Initial tweets from the airport, which is where the plane ultimately landed, simply cited an "incoming aircraft" that placed the airport and local fire and police officials "on alert."
A source tells People the airport was shut down specifically so Aniston's plane could land. USA Today reports the plane circled the airport for three hours to burn off fuel before touching down in a "slightly shaky but successful landing" around 2pm local time. Aniston and her party took off in another plane about two hours later. Also said to be on board: Friends co-star Courteney Cox. (Read more Jennifer Aniston stories.)