"The US Department of State warns US citizens to avoid travel to southeastern Turkey," the warning said on Monday night.
"Given the recent terrorist attacks and increased threats from international and indigenous groups, US citizens should exercise caution when traveling throughout the country," the statement explained.
Recent terrorist attacks from international and indigenous groups have targeted popular tourist sites, US government buildings, police and other local authorities throughout Turkey, the State Department noted.
"The threat of kidnapping remains a concern, especially in the southeast. There have been incidents of cross-border shelling from Syria into Turkey," it said.
Travel restrictions remained in place for US government employees against visiting the provinces of Hatay, Kilis, Gaziantep, Sanliurfa, Sirnak, Diyarbakir, Van, Siirt, Mus, Mardin, Batman, Bingol, Tunceli, Hakkari, Bitlis, and Elazig, the advisory noted.