The US Embassy in Mexico City is prohibiting US government employees from traveling to popular resort town Playa del Carmen.
The US Consular Agency in Playa del Carmen in the state of Quintana Roo will be closed "until further notice", the embassy said in it alert.
The embassy said it had "received information about a security threat" on Wednesday. It did not specify what that threat is, CNBC reported.
The alert, issued Wednesday night, says US government employees have to cease traveling to the town "immediately" and "until further notice".
The move comes after the Feb. 21 explosion on the ferry that links Playa del Carmen with the town of Cozumel. The incident injured 25 people, including two Americans.
On March 1, undetonated explosive devices were found by Mexico law enforcement on another tourist ferry. Both incidents are still under investigation. After that incident, the embassy prohibited US government employees from using all tourist ferries.
The US State Department earlier this year put Mexico on a "Level 2: Exercise increased caution" alert status due to crime. It warns that some areas are experiencing violent crime such as homicide, kidnapping, carjacking and robbery.
US government employees are not allowed to travel between cities after dark in many parts of Mexico.
The US State Department has already advised travelers to avoid five states in Mexico due to crime.
Some tourist destinations have no warnings against them, including Mexico City, Cancun and Los Cabos.
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