The US warned its citizens against traveling to Nigeria over terrorism, civil unrest, and kidnapping risks.

In a Wednesday advisory, the State Department wrote that some regions now carry its highest “do not travel” designation. Washington also authorized the departure of non-emergency embassy staff and their families from Abuja, pointing to a deteriorating security environment. The move follows an uptick in deadly attacks across parts of the country, even as the US-Nigeria security partnership expands.

The two countries have been cooperating in areas including counterterrorism, maritime security, intelligence sharing, and military training. US-supported surveillance systems and aircraft have also assisted Nigerian operations against insurgents and armed groups.