Counterterrorism police are investigating after several suspicious packages were found at British Army recruitment offices across southern England.

"We can confirm that we are aware of  security incidents ongoing in Oxford, Slough, Brighton and Canterbury involving Armed Forces Careers Offices," a Ministry of Defense spokesman said in a statement. "The relevant civilian police authorities are investigating, with military EOD teams in support, and any further inquiries should be directed to the police. Security advice has been reiterated to our personnel."

According to Sky News, the discoveries come after the Army and post offices were put on alert when "basic but viable explosive devices" were found earlier this week by military recruiters in Aldershot, Reading and Chatham.

"Because suspicious packages were found at various locations yesterday, notes were sent out to all the Army Careers offices -- as well as the Post Office -- asking staff to be extra vigilant and look out for any suspect packages," Detective Superintendent Stan Gilmour, of the South East Counter Terrorism Unit, said.

There was no immediate confirmation of whether the packages contained explosives.

The Associated Press contributed to this report. 

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