"There is no justification for the closure of the Rafah crossing," Hamad al-Raqb, a spokesman for the protesters, said in a speech marking the beginning of a four-day sit-in.
"It is unbecoming of the historic relations between Egyptians and Palestinians," he insisted.
Leading Hamas figures and MPs attended the launch ceremony.
Egyptian authorities have tightened their control over the border with the Hamas-run Gaza Strip since last July's ouster of elected president Mohamed Morsi by the Egyptian army.
In recent weeks, Egypt has repeatedly closed the Rafah crossing, which – due to an ongoing, eight-year Israeli siege – represents Gaza's only window to the outside world.
The Egyptian army has also launched a campaign aimed at destroying the network of tunnels linking Gaza to Egypt's Sinai Peninsula, which in recent years had been used to bring vital commodities into the besieged coastal enclave, home to nearly 2 million Palestinians.
Hamas, an ideological offshoot of the Muslim Brotherhood, the group which propelled Morsi to power in the 2012 elections, has controlled the Gaza Strip, since 2007.
Snowden said that his revelations of government spying on private communications have resulted in protections that have benefited the public and global society.
Amardeep Singh, a spokesman for the Sikh Coalition, said the Pentagon had so far been unwilling to firmly commit to taking people whose religion included dress and grooming requirements.
Activists said Syrian government authorities released 15 women activists who had been held on terrorism charges at the sprawling Adra prison on the outskirts of Damascus
In the Black Sea, across the water from the Crimean Peninsula where Russian military groups have seized control, a U.S. navy destroyer will take part in manoeuvres with Romanian and Bulgarian warships.
The State Department said Kerry told Lavrov Washington wanted Moscow to cease its military advances in Ukraine, stop its drive to annex Crimea and end "provocative steps."
Saudi Arabia recently ratified an anti-terrorism law that rights campaigners have criticised as a tool to stifle dissent.
An official source expressed the kingdom's "disapproval and surprise at the Iraqi prime minister's hostile and irresponsible comments".
Shabaab leader Ahmed Godane, also known as Mukhtar Abu al-Zubayr, said Mogadishu's Western-backed government and Ethiopia were acting at the behest of the United States and would be defeated.
The death of Gisela Rubilar, 47, who was studying in the western Venezuelan city of Merida, brought to at least 21 the total number of fatalities in five weeks of demonstrations
The U.N. experts expressed concern in their report about violations of the arms embargo by "non-notified" deliveries of arms to government forces and transfers of weapons to the private market
Sweden has experienced several racist attacks in recent months, including an attack on an anti-racist march, swastika graffiti at a school with Jewish pupils and Nazi signs daubed on a mosque
Brigadier General Jamil Zeidan died in hospital after unidentified assailants shot him in Ain El-Hilweh, the largest Palestinian refugee camp in Lebanon
Moldova, an ex-Soviet republic wedged between Ukraine and Romania, with a population of about 4 million, is planning to sign a landmark trade deal with the European Union
Working conditions in the $22 billion industry have been under scrutiny since the April, 2013 collapse of Rana Plaza in which more than 1,100 workers were killed
About 150 people marched from Sofia University to the parliament building in downtown Sofia and submitted more than 560,000 signatures to parliament calling for the referendum
Iranian foreign ministry spokeswoman Marzieh Afkham had conveyed an official warning to the Austrian embassy in Tehran over the "unplanned meeting," IRNA said, without elaborating.