"Twenty tunnels are partially back to work since Sunday out of the 250 tunnels still closed because of Egyptian security measures on borders," a source in the Hamas borders and tunnels authority told Anadolu Agency.
The operational tunnels are being used to smuggle food, fuel and construction materials into Gaza.
About 40 to 50 trucks of cement are smuggled through the tunnels per day, down from 300 to 400 trucks daily.
The source said about 3 million litres of fuel were smuggled through the tunnels in the past five days.
Egypt has launched a security crackdown in Sinai in the run up to mass protests that led to the army's removal of elected president Mohammad Morsi.
The security crackdown has caused a fuel shortage in Gaza and doubled the prices of building materials.
An owner of a fuel-smuggling tunnel says the army reinforcements are disrupting the smuggling operations through tunnels.
"The smuggling operations are going slowly and at high risks because of the big security reinforcements at Gaza borders," he told AA.
He said army troops destroyed four fuel pumps and a tanker inside a smuggling tunnel on Friday.
But he said eight tunnels now operate to smuggle construction materials into Gaza, out of 50 tunnels.
"We are now able to smuggle 400 tons and cement and 400 tons of gravel, from more than 2,000 tons in the past," he said.
Another tunnel owner agrees: "Smuggling is being done with great difficulty and at high risks to the life of workers because of army attacks on the tunnels".
Underground tunnels are a lifeline for the Palestinians living in Gaza, which has been under an Israeli blockade since 2006.
Statement by Iraqi PM says Iraqi security forces captured western and southern parts of Tikrit.
Despite his success in French local elections, it is too early to talk about a Nicolas Sarkozy candidacy for the 2017 presidential election, say experts.
The opposition All Progressives Congress (APC) has declared victory for its candidate, Muhammadu Buhari in Nigeria's bitterly contested presidential election
The Dutch meteorological office issued a code red warning for the low-lying country's northern and coastal provinces, as gusts of up to 120 kilometres (75 miles) an hour battered the Netherlands.
With the court swamped with investigations in Africa and prosecutors already struggling to secure convictions, legal experts say they need to be absolutely certain before proceeding with a highly politicised case againstIsrael.
A source from Mostafa's office told AA that the deputy PM, who also serves as economy minister, presented his resignation during a Palestinian cabinet meeting in Ramallah on Tuesday
The official asserted that Abbas had not intended to call for Arab military intervention in the Gaza Strip, which since 2007 has been governed by resistance movement Hamas
Iraqi forces have retaken the Salaheddin provincial government headquarters in Tikrit from the ISIL , a significant advance in the battle to recapture the city, officials said Tuesday.
France’s National Front party has won a sizeable number of council seats in Sunday’s second round of local elections. Though the party didn’t do as well as was predicted in polls, its leader Marine Le Pen calls the results a "magnificent success."
Yehia Hawrani, a senior Hamas leader was killed in Syria's Yarmouk refugee camp
Two men were fired as the car attempted to breach the agency’s perimeter gate, according to CNN. 1 dead, 1 injured after crash.
Nigeria's muslim candidate Muhammadu Buhari is leading incumbent President Goodluck Jonathan by 2.2 million votes. In 19 states announced so far.
An NSA spokeswoman had no immediate comment. Spokesmen for Fort Meade and Anne Arundel County Police referred questions to the spy agency.
Ismail Haniyeh held a phone conversation on Monday with Turkish Prime Minister Ahmet Davutoglu.
The appeals court had said the New York City Board of Education's regulation, created so the city would not be perceived as endorsing religious activity in a public forum, "was consistent with its constitutional duties."