Police in Monaco and France were searching for a suspected bomber on Tuesday after three people were wounded by an explosion in the wealthy principality, which two sources said was an attack on a Ukrainian-born oligarch.

Two of the victims suffered life-threatening injuries, police said. One of the wounded is Ukrainian oligarch Vadym Yermolaiev, a source said.

Police hunt fugitive after a rare explosion wounds multimillionaire Vadym Yermolaiev and two others.