(Reuters) - U.S. Justice Department may reverse its agreement not to prosecute Swiss bank UBS Group AG (>> UBS Group AG) over manipulation of foreign exchange rates, Bloomberg reported, citing a person familiar with the matter.

A Justice Department official said in March that banks that have non-prosecution agreements over failures to police transactions for criminal activity could see those deals withdrawn.

UBS, along with four other main banking units, was expected to plead guilty to U.S. criminal charges over manipulation of foreign exchange rates, people familiar with the matter told Reuters on Monday.

JPMorgan Chase & Co (>> JPMorgan Chase & Co.) Citigroup (>> Citigroup Inc), British banks Royal Bank of Scotland (>> Royal Bank of Scotland Group plc) and Barclays (>> Barclays PLC), and UBS had been expected to resolve forex-rigging investigations by the U.S. Justice Department as soon as this week.

Representatives from UBS and the Justice Department were not immediately available for comment.

(Reporting by Kanika Sikka in Bengaluru; Editing by Ken Wills)