Two pro-gun US senators have called for changes to firearm laws, as the first victims of the Newtown school shootings were buried in Connecticut.

Democrats Mark Warner and Joe Manchin, who have “A” ratings from the National Rifle Association (NRA), now say action is needed after the massacre.

Noah Pozner and Jack Pinto, both aged six, were buried on Monday after funeral services attended by hundreds.

They were among 20 children and six adults killed at Sandy Hook school.

Other victims’ funerals will be held throughout the week, and the town has already begun removing Christmas decorations in mourning.

Two adults who were injured in the attack survived are recovering in hospital and would be crucial witnesses as police continue their investigation, it was confirmed on Monday.