At least seven civilians were injured Tuesday morning in two successive blasts in Lashkar Gah, the provincial capital of southern Afghan province of Helmand, the police said, Xinhua reported.
"Two explosive-laden tricycles went off in a quick succession near a car market in Lashkar Gah Monday morning, leaving the casualties," a provincial police spokesman, Farid Ahmad Farhang, told Xinhua.
The obvious target of the blasts was two Afghan military vehicles running the area but no security force member was injured in the incident, he said.
The explosive were placed under pastures in the vehicles and the first blast occurred at around 9:00 a.m. local time, Farhang said, adding that the initial probe suggests that the serial explosions were a "planned and coordinated" act.
The injured, including three children, were shifted to Emergency Hospital and their wounds were not life-threatening, a hospital source told Xinhua.
No group has claimed the responsibility for the attack so far.
Afghan National Police (ANP) have killed five Taliban militants and detained six injured militants after a clash in Khoshkabe, an area outskirts of Lashkar Gah and found two explosive-packed tricycle vehicles on Monday afternoon, according to Farhang.
In northern Kunduz province, two Afghan Local Police (ALP) members were injured when a roadside bomb went off near their patrol in Maidan Pukhta area in provincial capital Kunduz city at around 7:00 a.m. Tuesday morning.
"A suspected man, who owned a remote control device, was detained by police shortly after the blast," police spokesman Seyd Sarwar Housaini told Xinhua.
The Taliban insurgents, who have been waging more than a decade- long insurgency, launched an annual spring offensive starting from May 3 to target Afghan forces and the U.S. and NATO troops across the country.
The Taliban insurgents have warned the civilians to stay away from official gatherings, military convoys and centers regarded as the legitimate targets by the militants.