Baghdad, Iraq (CNN) -- At least four people were killed and 16 wounded in a string of attacks since Tuesday night in the Iraqi capital, the Interior Ministry said Wednesday.
Bombs attached to vehicles -- dubbed "sticky bombs" -- killed a judge in western Baghdad's Yarmouk district and wounded a Sons of Iraq leader in southwestern Baghdad, a Ministry of Environment employee in western Baghdad and two civilians in southern Baghdad's Dora district.
At least two civilians died when a roadside bomb detonated in western Baghdad's Adel neighborhood. Four others were wounded.
A fourth death took place late Tuesday night when a school teacher was shot dead outside his home in western Baghdad, the ministry said.
Hand grenades tossed by attackers wounded five policemen, three at a checkpoint in the al-Ghazaliya neighborhood in western Baghdad and two at a checkpoint in southwestern Baghdad.
And in central Baghdad, gunmen in a speeding vehicle opened fire on a police checkpoint, wounding at least two policemen and a civilian.