(CNN) -- Protesters marching on Egypt's presidential
palace Tuesday night broke through barbed wire around the building and
hurled chairs and rocks at retreating police.
Police lobbed tear gas back at them.
More violence broke out
at the headquarters of the Freedom and Justice Party in Menia, south of
Cairo. At least 19 protesters were injured, according to Mahmoud Amin,
who is in charge of ambulance operations outside the palace.
The Freedom and Justice
Party -- an Islamist political group that has links to the Muslim
Brotherhood -- is the party of President Mohamed Morsy.
Egypt's Health Ministry
said at least 50 ambulances had been dispatched to locations around
Cairo, including 20 to the presidential palace. Hospitals were placed on
high alert in anticipation of injured protesters, the ministry said.
Many in Egypt believe a
new draft constitution in the country which will soon be put to a
popular vote is unfair in its wording, and is an attempt by Morsy to grab more power.
Morsy was not at the
palace when the protesters descended, his office said. He was out
meeting with government officials, they said.
The protests cap a day of
silent protest by media organizations opposing the country's new draft
constitution and an edict Morsy issued nearly two weeks ago to expand
his powers.
Freedom and Justice Party
media adviser Murad Ali warned that organizers of the protest outside
the palace could face consequences.
They "must bear the
responsibility of the demonstrations they called, and bear full
responsibility for any violence that may result from poor organization,"
he said.
