Legal action is brewing behind the scenes against the city of Austin and SXSW over the tragedy this spring, in which an allegedly drunk driver crashed through barricades and accelerated through a crowd of South by Southwest Music Festival revelers, killing four and injuring 24.

The city has received notice of claim letters from four attorneys representing seven SXSW crash victims; five were injured and two died. Two of the lawyers demanded money totaling $1.65 million for three of the victims, according to records that the city released to Texas Lawyer under a Texas Public Information Act request.