Sanaa, Yemen (CNN) -- Hundreds of anti-government protesters marched toward a presidential palace in Yemen on Sunday, calling for regime change in the Middle Eastern country. Some of them chanted, "First Mubarak, now Ali," referring to Yemeni President Ali Abdullah Saleh and Hosni Mubarak, who recently resigned as president of Egypt after nearly 30 years in power. Security forces put up a barbed wire barricade and blocked the protesters' path about two miles from the palace. At that point, the situation intensified as protesters turned away and attempted to reach the palace through side streets. Clashes between protesters and police were reported by witnesses.
@highlight
Clashes reported between protesters and police
@highlight
President delays visit to the United States
@highlight
Government forces set up a barbed wire barricade to block protesters
@highlight
Echoes of Egypt's revolution have resonated across the region
@placeholder's lengthy rule ended Friday when he stepped down after 18 days of anti-government protests rocked Egypt.
Mubarak's lengthy rule ended Friday when he stepped down after 18 days of anti-government protests rocked @placeholder.