The U.K.'s Serious Fraud Office said Tuesday that it has charged four former executives of Barclays plc (BCS) - Get Report , including CEO John Varley, in a probed linked to the bank's capital raising at the height of the global financial crisis in 2008.

The SFO said the charges include conspiracy to commit fraud and unlawful financial assistance and that that defendants, including former CEO John Varley, former investment banking chairman Roger Jenkins, Barclays Wealth CEO Thomas Kalaris and Richard Boath, the former head of the bank's financial institutions group. All of the defendants will appear before Westminster Magistrates' Court on July 3, the SFO said.

"The charges relate to Barclays Plc's capital raising arrangements with Qatar Holding LLC and Challenger Universal Ltd, which took place in June and October 2008, and a US$3 billion loan facility made available to the State of Qatar acting through the Ministry of Economy and Finance in November 2008," the SFO said.

The charges, which followed a five year investigation, relate to a series of funding agreements arranged with the state of Qatar during the financial crisis which the bank pursued in order to avoid being sheltered by the British government. The SFO is likely to focus on the £322 million ($410 million) in fees that were allegedly paid to Qatari investors in order to facilitate the loan agreement.

Barclays said it was "considering its position in relation to these developments" in a statement published Tuesday and noted that "the SFO has informed Barclays that it has not made a decision as to whether it will also bring charges against Barclays Bank PLC in respect of the Loan."

Barclays shares closed at  206.75 pence each in London Monday after gaining around 1.72% on the session. That trimmed their year-to-date advance to 7.5%.