Yemen remained under tight security Saturday, as the military enforced the state of emergency set in motion after a rooftop sniper killed 42 anti-government protesters on Friday. Security forces set up checkpoints to look for any concealed weapons, as tanks rolled into the streets to enforce the nightly curfew Friday. The state of emergency restricts freedom of movement and the right to gather, and grants the police greater leeway in arrests—a last-ditch effort by Yemeni President Ali Abdullah Saleh to hang onto power after 32 years. Al Jazeera reported Saturday that police stormed a protest camp in the southern port city of Aden and wounded three anti-government protesters. Yemen became the second Middle Eastern state to declare emergency rule in a week—Bahrain declared martial law on Tuesday.