harkhand,January 17(ANI):A landmine blast triggered by suspected Maoist rebels on Saturday killed seven police personnel and a civilian in Gumla district of Jharkhand.Rebels blew up a truck in which police personnel were traveling.
Meanwhile, police have launched an investigation.The rebels have ignored repeated calls to renounce violence and negotiate, and have stepped up their attacks in recent past months, prompting the government to go after them in a
concerted strike.
Source :
http://in.news.yahoo.com/139/20100117/808/tnl-maoists-kill-8-including-7-cops-in-a.html Could you please explain to me the emboldened parts?
I know "concerted" means "a serious and determined effort" but I no idea what "strike" means in this context.