KIEV, March 15 - The Ukrainian Foreign Ministry has denied a report that it has reached tentative agreement on Kiev's cooperation with the Customs Union formed by Russia, Belarus and Kazakhstan.

"Talks on a possible format for Ukraine's cooperation with the Customs Union continue, but it is still early to speak about any agreements," the ministry's acting spokesman Yevhen Perebyinis said, commenting on news reports claiming that an agreement on Ukraine's associate membership in the union was allegedly achieved.

He did not confirm media claims that a Ukrainian delegation held talks in Moscow this week.