The United States Embassy has warned its citizens in Nigeria against travelling on the airport road in Abuja.
The warning came after suspected terrorists attacked Kuje prison and freed inmates.
Also, United Kingdom citizens are warned to be cautious of travelling to 19 states in Nigeria.
Among the states are Borno, Yobe, Adamawa, Gombe, Kaduna, Katsina, Zamfara and riverine areas of Delta, Bayelsa, Rivers, Akwa Ibom and Cross River.
They are advised to only embark on essential travel to Bauchi, Kano, Jigawa , Niger, Sokoto, Kogi, within 20km of the border with Niger in Kebbi State, Abia and non-riverine areas of Delta, Bayelsa, Rivers, Plateau, and Taraba.