A suicide bomber has blown himself up
at a Shia religious ceremony in north-
east Nigeria, killing about 20 people,
eyewitnesses have told the BBC. The bomber joined the ceremony in
Potiskum town and blew himself up, the
witnesses said. No group has said it carried out the
attack, but suspicion is bound to fall on
militant Sunni Islamist group Boko
Haram. It denounces Shias, a small minority in
Nigeria, as non-Muslims. Witnesses said the bomb exploded as the
crowd was marking Ashura, a solemn
day when Shias mourn the martyrdom of
Hussein, a grandson of the Prophet
Muhammad, in 680 AD at Karbala in
modern-day Iraq. Boko Haram has waged an insurgency in
Nigeria since 2009. It has repeatedly targeted Christians and
rival Muslim groups. In July, it was blamed for bombing an
open-air mosque in Potiskum, killing four
people.

When will all these bombing and killing end? Is it that Nigeria can not fight and defeat Boko Haram?

I wonder what will happen if another country try to fight us.