July 19 (Reuters) - Following are security developments in Afghanistan at 1315 GMT on Saturday:

* denotes new or updated item

* KANDAHAR - A Canadian soldier was killed by an improvised explosive device on Friday while on a foot patrol in Panjwai district of the southern province of Kandahar, the Canadian Defence Ministry said on its website on Saturday.

PAKTIA - Insurgents attacked a police checkpoint in Wazi Zadran district of the eastern province of Paktia on Friday killing four policemen, the Interior Ministry said on Saturday. Two policemen were also missing, it said.

HELMAND - Three Afghan security guards providing security to a coalition convoy were killed and four more were wounded when their vehicle hit a roadside bomb on Friday in Nawa district of Helmand province in southern Afghanistan, the ministry said on Saturday.

HELMAND - Two Afghans working for the security company USPI were killed on Friday when a mine exploded near their office in Gereshk district of Helmand province, the ministry said.

KANDAHAR - Four policemen were killed and one wounded when their vehicle hit a roadside bomb in Mayman district of Kandahar on Saturday, district police chief Khan Mohammad said.

KANDAHAR - A suicide bomber wounded one policeman when he detonated his explosives next to a passing police convoy in Daman district of Kandahar province on Saturday, district chief Mohammad Rasul said.

KHOST - One Afghan security guard was killed and three more were wounded on Saturday when their vehicle, which was providing security for a NATO supply convoy, struck a roadside bomb on the main highway between Khost and Paktia provinces in the east of the country, a district chief Lutfullah Baba Karkhel said. (Reporting by Ismail Sameem and Kamal Sadaat; Compiled by Jonathon Burch; Editing by Alison Williams)

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