The US National Hurricane Centre has downgraded Tropical Storm Nate to a tropical depression as it moved into Mexico on Sunday with little impact. Officials report no serious damage or injures after Nate made landfall in Veracruz along the southern Mexican gulf coast and weakened. Forecasters cancelled tropical storm warnings and watches and say they expect the storm to break up on Monday.Meanwhile, forecasters are urging parts of the Caribbean, including the Virgin Islands and Puerto Rico to keep an eye on Tropical Storm Maria.