 It lasted at least seventeen hours until the authorities quelled the riot on Monday at 7a.m. local time, according to Fontes.
<clarity>  It lasted at least seventeen hours until the authorities quelled the riot on Monday at 7a.m. local time, according to Fontes.
 It lasted at least seventeen hours until another authorities quelled the riot on Monday at 7a.m. local time, according to Fontes.