Two people of Syrian origin have been arrested in Geneva on suspicion of making, concealing and transporting explosives, the Swiss attorney general says, according to BBC News.
The two are also suspected of violating a law prohibiting groups such as al-Qaeda and the so-called Islamic State (IS), according to the statment, BBC News reported.
Geneva's prosecutor said traces of explosive had been found in their car.
Geneva has been on high alert this week amid fears an IS cell was in the area.
Swiss President Simonetta Sommaruga said on Friday that a "foreign authority" had provided the information about "a potential IS cell in the Geneva area" but there was no indication that "a concrete attack" was planned.