By Foo Yun Chee

BRUSSELS, July 24 (Reuters) - EU antitrust regulators will investigate whether U.S. investment firm KKR KKR.N provided incorrect or misleading information in its 22-billion-euro ($26 billion) acquisition of Telecom Italia's (TIM) TLIT.MI fixed-line network deal, the European Commission said on Thursday.

The Commission, which acts as the competition enforcer in the 27-country bloc, approved the deal unconditionally in May last year, attributing this in part to long-term agreements between FiberCop and telecoms companies Fastweb and Iliad.

FiberCop is Telecom Italia's last-mile grid unit.

"Under the investigation opened today, the Commission will assess whether KKR provided incorrect or misleading information about these agreements," the EU watchdog said in a statement.

The Commission has in recent years cracked down on companies providing misleading information during merger reviews and handed out hefty fines.

(Reporting by Foo Yun Chee)

((foo.yunchee@thomsonreuters.com; +32 2 585 2866; Reuters Messaging: foo.yunchee.thomsonreuters.com@reuters.net))