Four crew members are presumed dead pending positive identification, according to a statement emailed to The San Diego Union-Tribune by Marine spokeswoman Capt. Morgan Frazer in Miramar.
Officials have not confirmed the military branch of the victims or if they were all Marines, NBC 7 reported.
The authorities are investigating the crash case, to know the actual cause behind the crash.
The helicopter had flown out of the Miramar air station in San Diego before crashing near to the border, according to the 3rd Marine Aircraft Wing.
This is a developing story.
Strong debut for Chinese oil futures
At 9:24 a.m. (0224 GMT) prices were up 3.29 per cent at 430 yuan, with 19,122 lots, equal to 19.1 million barrels of oil, traded. Brent for May settlement rose to $70.97 a barrel on the London-based ICE Futures Europe exchange.
He added, "We pray for their families" and the U.S. Marine Corps.
Tuesday's crash would be the deadliest Marine aircraft crash since a KC-130T transport plane went down in MS last summer, killing 15 Marines and a Navy sailor, according to the Associated Press.
According to the Associated Press, the CH-53E Super Stallion crash is the deadliest to involve a military aircraft since 15 Marines and a sailor were killed after a KC130T transport plane went down in MS in July 2017.
Tuesday's crash marks the deadliest crash involving Marines since past year.
This is not the first time a CH-53E was involved in a deadly crash. It is used for minesweeping and transport and can carry dozens of troops and tons of cargo.
Two years ago, 12 Marines died when two of the helicopters collided off the coast of Oahu in Hawaii.
Boy who fell into sewer pipe found alive
Cameras used to inspect pipes for fix were used to float at the top of the pipe and crawl along the bottom, Scott said. They attached a camera to a floatation device and send it 300 feet down the pipe.
United States exempts South Korea
The South Korean economy relies heavily on exports and benefitted from $119.3bn of bilateral trade with the U.S. a year ago . Reducing South Korean non-tariff barriers to U.S. automotive exports has been a priority for the Trump administration.
Anti-India protests erupt in Kashmir amid deadly fighting
According to a Kashmir Media Service report, search operations were conducted in Islamabad and Shopian districts of South Kashmir. The Indian police also raided the residence of APHC leader, Muhammad Yousuf Naqash, in Srinagar and harassed his family members.
Sinclair's 'hostage videos' a reminder of need for a free press
The message calls out supposed bias and false messages in news stories spread on social media and in various unnamed news outlets. Deadspin received a hat tip from HBO's John Oliver , whose " Last Week Tonight " did a lengthy story on Sinclair last season.
Islamabad United emerge PSL champions
Pakistan Super League 2018 waved the Pakistan with full swing through unbelievable matches held between different teams. The stars headlining the ceremony included musicians Ali Zafar, Shehzad Roy, Strings band, Farhan Saeed and Aima Baig.