The death toll from an air strike on a hospital in the northern Syrian city of Aleppo has risen to at least 50 people.
The French charity Doctors Without Borders (MSF), one of the funders of the hospital, said the death toll included six medics.
The Al-Quds hospital, in a rebel-held part of the divided city, was struck overnight on April 27 in an attack that was widely condemned abroad.
U.S. Secretary of State John Kerry said in Washington on April 28 that Washington was "outraged" by the air strikes on the hospital.
He said the attack matched a pattern by Syrian warplanes on health-care facilities that "have killed hundreds of innocent Syrians" during the country's civil war, which began in 2011.
Kerry said Russia has "an urgent responsibility to press the [Syrian] regime to fulfill its commitments" under Security Council resolution 2254 to stop its attacks on civilians and medical facilities.