Authorities are searching for evidence after a man with a makeshift flamethrower yelled “Free Palestine” and hurled an incendiary device into a group that had assembled to raise attention for Israeli hostages in Gaza. Eight people were injured in the Sunday attack, some with burns. The suspect, 45-year-old Mohamed Sabry Soliman, was booked into the Boulder County jail north of Denver and expected to face charges in connection with the attack the FBI was investigating as a terrorist act. The burst of violence at the popular Pearl Street pedestrian mall unfolded against the backdrop of a war between Israel and Hamas that continues to inflame global tensions.