"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.
A record 7210 police cadets joined Kenya's nearly 35,000 police force in April.
Two former U.S. soldiers testified at the pre-trial hearing of a one-time comrade charged with killing two unarmed Iraqi boys
U.S. officials have grown increasingly impatient with what they describe as Russia's failure to live up to its commitments in an April 17 agreement reached in Geneva to try to de-escalate the crisis
Congress will need to approve the move before it goes through.
The pictures, flowers and spaces are banked up the entire wall of a gymnasium near Danwon High School in Ansan, on the outskirts of Seoul.
Zhang Zhiru's brief detention underscores nervousness among officials about the strike, which began on April 14 at a Yue Yuen Industrial Holdings Ltd shoe manufacturing complex that employs some 40,000 workers
On Wednesday, Hamas and Fatah signed an agreement that aims to end years of division between the two factions.
Two weeks of scouring the Indian Ocean floor with a U.S. Navy submersible drone had turned up no wreckage.
The winner of the race will inherit a strong but slowing growth rate in the country and will oversee the completion of a multibillion-dollar expansion of the Panama Canal
The Fallujah dam was recently seized by the Islamic State of Iraq and Levant (ISIL) group, which took control of large swathes of the city last December.
Pacific nation that was site of 67 nuclear tests between 1946 and 1958 accuses states of 'flagrant denial of human justice'
The two core EU nations' top diplomats affirmed plans to speed up the signing of a deal to boost trade and political ties
Abdel Aziz came to power in an army coup in 2008, won an election the next year and is a Western ally
In a sign of further delays to restart vital oil exports from the volatile east, rebels said the Tripoli government had failed to fulfil its part of the accord reached this month.
Hamid Babaei, spokesman for Iran's U.N. mission in New York, vehemently rejected U.S. Ambassador Samantha Power's remarks
Kiir had accused the four detainees - a former ruling party official, national security minister, deputy finance minister and ambassador to Washington - of fomenting a coup