they used these weird bombs

Another refugee, Abu Sabah, an older man in a torn shirt and dusty pants, told of how he escaped with his family, just the day before [the attack on Fallujah], while soldiers shot bullets over their heads, killing his cousin. "They used these weird bombs that first put up smoke in a cloud, and then small pieces fell from the air with long tails of smoke behind them. These exploded on the ground with large fires that burned for half an hour. They used these near the train tracks. When anyone touched those fires, their body burned for hours."
This was the first time I had heard a refugee describing the use of white phosphorous incendiary weapons by the US military, fired from artillery into Fallujah. Though it is not technically a banned weapon, it is a violation of the Geneva Conventions to use white phosphorous in an area where civilians may be hit. I heard similar descriptions in the coming days and weeks, both from refugees and doctors who had fled the city.