The search for a Pakistani national is still on over the alleged theft of money from four bank accounts belonging to people aboard missing Malaysia Airlines Flight 370, according to Malaysian investigators. An HSBC bank officer and her husband have been arrested by Malaysian authorities in relation to the theft.

The bank officer is accused of using Internet banking to transfer money from four passengers' bank accounts into another passenger's account, CNN reported. The fifth account belonging to Ali Farran had about $10,000 (35,000 Malaysian ringgit) allegedly transferred to it, police said.

"We are still trying to locate this Ali Farran, who last worked as a car mechanic," Assistant Commissioner Izany Abdul Ghany of the Kuala Lumpur Commercial Crime Investigation Department said Monday.

In total, about $35,000 (110,600 Malaysian ringgit) was reported missing from the accounts of two Chinese passengers, Ju Kun and Tian Jun Wei, and two Malaysians, Hue Pui Heng and flight steward Tan Size Hian.

Since the couple's arrest on Thursday, police have yet to charge the couple, who have been in police custody, for the alleged theft. "We have extended the remand order for the two until Wednesday to facilitate in the investigations," Izany said.

HSBC's Malaysian branch said it notified police of potential fraud involving the accounts. "HSBC is deeply sorry for this incident and apologizes to the families of our customers for the distress this will cause and assures them there will be no losses on these accounts," a spokeswoman said.

On March 8, Flight 370 went missing en route from Kuala Lumpur to Beijing. Despite extensive land and sea searches, officials have failed to find any sign of the missing Boeing 777-200ER, which was carrying 227 passengers and 12 crew. It's believed that the plane crashed into the southern Indian Ocean, west of Australia.

"This month, Australian officials announced that Dutch company Fugro Survey would take over the next phase of the search, which was likely to start in September," CNN reported. "The company will use two ships equipped with towed deep-water vehicles, as well as side-scan sonar, multibeam echo sounders and video cameras, to search an area of 60,000 square kilometers (23,000 square miles) and depths of up to 7,000 meters (four miles)."