Nov 30 (Reuters) - Following are security developments in Afghanistan at 0840 GMT on Sunday:

ZABUL - Taliban insurgents released on Sunday two Afghan journalists kidnapped from the main highway in southern Zabul province last week, officials said. No reason was given for the abduction or freedom of the pair, who work for foreign media.

KANDAHAR - A roadside bomb killed an Afghan guard of a foreign security firm on Sunday in a remote area of Kandahar which also lies in the south, police said.

HELMAND - NATO-led force shot dead an Afghan policeman in neighbouring Helmand in a car when he failed to notice standard warning shots from an alliance convoy on Saturday, the force said. (Compiled by Sayed Salahuddin; Editing by Jerry Norton)

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