1.   Tense soldiers detonated concussion grenades in an effort to disperse the crowds.

2.   As they neared Pike Place Market, Lockhart said she could hear concussion grenades several blocks away.

3.   He did not appear, and about an hour later they fired a second round of the caustic chemical, then set off concussion grenades to stun him.

4.   The attack began as commandos set off two concussion grenades.

5.   The pock-pock of sniper fire mixed with the loud thud of tear-gas cannisters and concussion grenades.

6.   The sound of concussion grenades came with the dawn.

7.   Other options are to put concussion grenades, explosives or smoke bombs down tunnels to stun those inside, or smoke them out.

8.   A commando, dressed in black, stood on a stairway trying to throw a concussion grenade into the cockpit through the open window.

9.   A U.S. official in Washington said two concussion grenades were thrown at the embassy wall.

10.   After officers fired concussion grenades and entered the house, they heard gunshots, Police Chief Arthur Jones said.