The pan-European STOXX 600 <.STOXX> hit its lowest since April 24 in early deals, down 0.7 percent, in step with euro zone stocks <.STOXXE> and blue-chips <.STOXX50E>.
Technology stocks <.SX8P> fell 1.2 percent to a two-week low, the worst performer with every stock on the index in the red, hit by jitters after a ransomware attack swept the globe, disrupting computers at banks and large companies including WPP (>> WPP Group), Moeller Maersk (>> AP Moller-Maersk) and Metro (>> Metro).
Semiconductor makers AMS (>> ams (Austria Mikro Systeme)), Dialog Semiconductor (>> Dialog Semiconductor), ASM International (>> ASM International) and STMicro
Lower oil prices weighed on oil and gas stocks <.SXEP>, with Tullow Oil (>> Tullow Oil) the biggest faller after its first-half results.
Meanwhile, positive results and acquisitions drove the handful of gainers.
Business supplies distributor Bunzl (>> Bunzl) rose 4 percent after saying a boost in recent acquisitions would help it increase first-half revenue 7 percent.
French industrial group Legrand (>> Legrand) rose 2.8 percent after saying it would buy U.S. infrastructure company Milestone.
(Reporting by Helen Reid, editing by Ed Osmond)