A Dhaka court today again asked Rapid Action Battalion (Rab) to submit -- by April 21 -- the probe report of a case filed over the murders of journalist couple Sagar Sarowar and Meherun Runi.

With today's date, the investigation officer has so far taken 79 dates to complete the investigation.

Dhaka Metropolitan Magistrate Rajesh Chowdhury passed the order after Rab's Additional Superintendent Khondoker Shafiqul Alam, also investigation officer of the case, failed to submit the report today.

Sagar, news editor at private TV channel Maasranga, and his wife Runi, a senior reporter at ATN Bangla, were killed in the early hours of February 11, 2012 at their rented flat in Dhaka's West Razabazar.

After Sher-e-Bangla Nagar police and the Detective Branch of police, Rab was tasked with the probe on April 18, 2012.