LONDON, England (CNN) -- A doctor arrested in Cheshire after the failed car bombings in central London and at Glasgow International Airport last month was charged Thursday with conspiracy to cause explosions, Scotland Yard said.
Mohammed Asha, 26, is the third physician and fourth man charged in the case, and is to appear in Westminster magistrate court Friday.
He is of Palestinian descent and grew up in Jordan.
His wife, who was traveling with him on the M6 highway when he was arrested, has been released.
Asha could have been held without charges until July 21, under a magistrate's order last weekend extending his detention.
Two cars packed with nails and gas cylinders were discovered in London on June 29; the next day, a jeep carrying gas cylinders was driven into a terminal entrance at the Glasgow International Airport.
Authorities believe two men who parked the cars in London traveled six hours to Glasgow to carry out that mission.
Two other doctors have been charged in London, and one in Australia.
They are Dr. Sabeel Ahmed, 26, of Liverpool; Dr. Mohammed Haneef, 27, now in Brisbane, Australia; and Dr. Bilal Abdullah, 27. Ahmed and Abdullah are named as Asha's co-conspirators, according to case documents.
Haneef was charged in Brisbane with providing "reckless support" to a terrorist organization.

A fifth man, Kefeel Ahmed -- brother of Sabeel Ahmed -- is under armed guard in a Glasgow-area hospital with burns over his entire body from the airport blast. He has not been charged.
Haneef is alleged to have provided a mobile phone SIM card to his cousins -- Sabeel and Kefeel Ahmed. E-mail to a friend ![]()
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