North Sinai's health ministry coordinator said on Monday that 21 people have been killed while 122 were wounded in armed attacks in the Sinai Peninsula since the ouster of Islamist President Mohamed Mursi on July 3. 

The killed include seven civilians and others from the army and police while the wounded include 81 from army and police forces. 

Since Mursi was ousted about two weeks ago, armed attacks on security checkpoints in Sinai have increased.