Police in Texas say a man suspected of opening fire in a crowded entertainment district of the city of Austin, killing one woman, was probably aiming at someone else.
Authorities said the 24-year-old suspect remains at large, more than a day after the shooting along Austin's famed Sixth Street of music clubs.
A judge has signed a murder arrest warrant with a $2 million dollar (€1.79 million) bond.
A witness told police the suspected gunman had been shoved by another man when he pulled out a handgun tucked into his waistband.
Investigators found four bullet casings near a 20-year-old woman who was fatally shot in the head.
Three other women were taken to hospital with serious but non-life-threatening injuries.
Police have described a "chaotic" scene during the shooting.