H1B Transfer in Premium Status Changed from Acceptane to Initial review

On June 3, 2013, the 15-day Premium Processing clock stopped on your I129, PETITION FOR A NONIMMIGRANT WORKER. A notice was sent on this date explaining the specific reason for stopping the premium processing of your case. This notice will contain detailed information on further action required by you. Your premium processing receipt notice contains contact information for direct inquiries on your case.

Can anyone throw some light on this or suggest if its an RFE or approval?

See H1B Premium Case status in Initial review since more than 20hrs