The United State Department has urged American citizens in parts of Mexico to shelter in place amid violence, road blocks and flight cancellations after Mexican soldiers killed a top cartel boss.

A statement from the department’s Consular Affairs section revealed on social media platform X that roadblocks have impacted airline operations, with some domestic and international flights cancelled in both Guadalajara and Puerto Vallarta.

Recall that the Army said in a statement that Nemesio Oseguera, a 59-year-old leader of the Jalisco New Generation Cartel, was wounded in a clash with soldiers in the town of Tapalpa and died while being flown to Mexico CityHe had a $15 million US bounty on his head.

Canada said it was monitoring the situation closely and advised Canadians in Mexico to keep a low profile and follow the advice of local authorities.

US carriers United, American, Southwest and Alaska, as well as the Canadian airlines Air Canada and WestJet/Sunwing, announced the cancellation of flights to Puerto Vallarta, Guadalajara, and Manzanillo.

Some planes had to turn back while already en route to Mexico, several airlines said, including Southwest, which turned back four flights originally bound for Puerto Vallarta.

Southwest said it would send aircraft to Mexico to repatriate its stranded passengers and staff once the situation normalises.