BANGKOK, THAILAND - MAY 15: Protesters and bystanders gather at the scene of a deadly drive-by attack on an anti-government rally site at the landmark Democracy Monument on May 15, 2014 in Bangkok, Thailand. Unidentified assailants on a pick-up truck attacked the protest site overnight with a grenade and gunfire, killing three protesters and wounding over 20. The attack came amid fears of violence between rival pro and anti-government groups in Thailand's ongoing political turmoil. (Photo by Rufus Cox/Getty Images)
BANGKOK, THAILAND - MAY 15: Protesters and bystanders gather at the scene of a deadly drive-by attack on an anti-government rally site at the landmark Democracy Monument on May 15, 2014 in Bangkok, Thailand. Unidentified assailants on a pick-up truck attacked the protest site overnight with a grenade and gunfire, killing three protesters and wounding over 20. The attack came amid fears of violence between rival pro and anti-government groups in Thailand's ongoing political turmoil. (Photo by Rufus Cox/Getty Images)

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Thai military threatens to quell protests

Violent protests that left three people dead may force Thailand's military to get involved. Saima Mohsin reports.

Thai military threatens to quell protests

Violent protests that left three people dead may force Thailand's military to get involved. Saima Mohsin reports.