By Harriet Sherwood in Jerusalem, Guardian.co.uk, May 15, 2011

At least 13 people killed as troops clash with demonstrators in Gaza and on the borders with Syria and Lebanon.

Thousands of Palestinians and their supporters were embroiled in deadly confrontations with the Israeli army as protests erupting across the Palestinian territories, Israel and its borders with Syria, Lebanon and Jordan were met with live fire, rubber bullets, stun grenades and teargas.

At least 13 people were reported killed in a day of bloody confrontations, including 10 at the Lebanese border, at least two at the Syrian border and one in Gaza. However some sources said 10 people had been killed on the Syrian border. Police also fired teargas to disperse hundreds of protesters on the Jordanian border....

Also see:

Palestinians killed in 'Nakba' clashes
Al Jazeera, May 15, 2011

Several killed and scores wounded in Gaza, Golan Heights, Ras Maroun and West Bank, as Palestinians mark Nakba Day.

and:

Scores injured at 'Nakba' rally in Cairo
Al Jazeera, May 15, 2010

Security forces disperse "Nakba Day" demonstrators after group attempts to "storm" Israeli embassy in Egyptian capital