Tunisia closes borders with Libya after violence
 Tunisia closed its main border crossing with Libya on Friday after 
thousands of stranded Egyptian and foreign nationals, fleeing militias' 
fighting and violence in Libya, tried to break through the passage, the 
Tunisian news agency said.
An Associated Press reporter at 
the crossing said no one managed to make it to the other side and 
security forces used vehicles to physically block access. After a 
Tunisian police officer was wounded by gunfire from the Libyan side of 
the border, authorities closed the crossing, the official Tunisian news 
agency TAP said.
A day 
earlier, two Egyptians were killed during a similar protest demanding to
 be let through. Tunisian officials say thousands of Libyans have been 
crossing the border each day the past week.
Libya
 is witnessing its worst factional violence since the downfall of the 
longtime dictator Moammar Gadhafi in 2011 civil war. Along with the 
fighting in Tripoli, which the Health Ministry said has killed 214 
people and wounding more than 980 others, Islamic militias the past week
 overran army bases in Libya's second largest city, Benghazi, and 
claimed control of the city.
 
        
On Friday, a powerful 
explosion ripped through the main police headquarters in Benghazi, 
nearly flattening it, witnesses said. The blast shook nearby houses and 
echoed across the eastern city.
The
 headquarters had been empty because of earlier shelling by militiamen. 
Friday's blast appeared to be from explosives planted inside the 
building, said witnesses at the site. They spoke on condition of 
anonymity, fearing for their own safety. Police officials in Benghazi, 
could not be reached for comment.
The spiral of violence in the country's two main cities prompted calls for public protests Friday against militias.
"It's
 time for a popular uprising to rescue Libya," said Abdel-Moneim 
al-Yassir, a lawmaker in the outgoing parliament and head of its 
National Security Committee. He called for protests on his Facebook 
page, saying they were "the only solution ... to put an end to the 
situation by disarming and demobilizing militias under a national 
accord."
The Tripoli violence
 erupted in early July when militias originally from the western city of
 Misrata, which are allied to Islamist politicians, carried out a 
surprise attack on militias from the western town of Zintan who control 
the airport. The move was in retaliation for a months-long campaign 
aiming to crush Islamic militias being waged by army troops led by a 
renegade general, Khalifa Hifter.
 
        
The battles have destroyed
 parts of Tripoli's international airport, and shelling earlier this 
week hit three oil depots, sparking a raging fire that firefighters have
 struggled to put out amid the continued fighting. The National Safety 
Agency, which oversees emergency services, said that one depot was still
 on fire on Friday.
The 
fighting in Tripoli and Benghazi is seen as a push by Islamists and 
their allied militias to shift a longtime balance of power among Libya's
 many militias.The militias emerged after the 2011 civil war that led to
 the ouster and death Gadhafi. Since then, the central government, 
police and military have largely had no authority.
The
 intensity of the fighting prompted foreign diplomats to flee the 
country along with thousands of Libyans and foreign workers.
But with Tripoli International Airport closed by fighting, there are few options besides the Tunisian crossing.