ການຕາມລ່າໂຕ ຜູ້ຕ້ອງສົງໄສ ວາງລະເບີດ ຄົນທີສອງ

One suspect is dead and the Boston area is on lockdown as police conduct a massive manhunt for the second suspect in the Boston Marathon bombings. Those bomb blasts on Monday killed three people - including an 8-year-old boy and a Chinese-born graduate student - and injured more than 170 others. VOA's Jeff Seldin has the latest.