Turkish Authorities detained on Saturday four people on suspicion of preparing terrorist act during the celebrations of Labour Day in Ankara, police said. 
Intelligence teams and anti-terrorism squads arrested the suspects in simultaneous operations after monitoring them, the state-run Anadolu Agency (AA) quoted security sources as saying. 
It added that investigations showed that the four suspects were belonging to ISIS organisation. 
The four suspects were Syrian nationals, the sources said, adding they were in contact with persons in areas under ISIS control in Syria.

Source: QNA