[Watser?]

In addition to the airstrikes, Raqqa was subjected to artillery and missile attacks, according to the activist collective known as Raqqa is Being Slaughtered Silently. It said the coalition used white phosphorous in the attacks.

In a video posted on its Aamaq news agency, IS also alleged the coalition used white phosphorous over Raqqa on Thursday at dusk, when Muslims would have been breaking their Ramadan fasts.

White phosphorous burns at extremely high temperatures and can be used to illuminate conflict zones or obscure them with smoke. International law prohibits its use in civilian areas because of its indiscriminate effects, from starting fires to causing excruciating burns for bystanders, according to Human Rights Watch, which said it was investigating the allegations.

News from The Associated Press