The nation on Sunday started observing the two-day mourning in commemoration of those killed during the hostage standoff at a café at the city’s Gulshan after it came under a terror attack on Friday.Prime Minister Sheikh Hasina on Saturday made the declaration for observing the two-day morning in her televised address to the nation in the wake of the grisly attack on the Spanish eatery in the country’ s diplomatic zone.Security forces on Saturday recovered the bodies of 20 foreign nationals launching a commando operation at the restaurant when six attackers and two policemen were also killed after terrorists held hostage a good number of people in it. Thirteen people, including a Japanese citizen and two Sri Lankan nationals, were rescued during the drive. Four pistols, one AK 22, four unexploded IID, one walk-ie-talk-ie and some locally made sharp weapons were recovered from the restaurant during the operation.