BRUSSELS, Aug 9 - EU antitrust regulators have extended the deadline for a decision on Facebook's purchase of U.S. customer service startup Kustomer by one week to Dec 15, a European Commission filing shows on Monday.
The EU executive, which acts as a competition enforcer for the 27-country bloc, opened a full-scale investigation into the deal earlier this month, saying it may hurt competition and reinforce Facebook's power in online advertising.
Facebook says it will cooperate with the Commission review.
The Commission said it had extended the deadline after Facebook asked for more time. Sol extensions are common during the summer holiday season when it is harder to find customers and rivals capable of answering questions about the market.
The German competition agency is also investigating the deal, while its UK counterpart is now checking to see whether Facebook should also seek its approval.