UPDATE 3-Triple suicide attack kills at least 30 in northeast Nigeria

* At least 42 others wounded in Sunday attack
* Islamist militants targeted people watching soccer
* Over 30,000 dead from Islamist insurgency since 2009

(Adds presidency, Amnesty International comments)
MAIDUGURI, Nigeria, June 17 (Reuters) - At least 30 people
were killed in a triple suicide attack in northeast Nigerian
state of Borno, state emergency officials said on Monday - the
biggest mass killing this year by Islamist militants.
No group has yet claimed responsibility for the attack,
which prompted President Muhammadu Buhari to call for security
to be stepped up in areas where large groups gather.
The Boko Haram group and its Islamic State splinter group
have often carried out attacks targeting civilians and the
military in Borno state.
Their attacks during a decade-long insurgency have killed
more than 30,000 people and displaced millions of civilians.
"Yesterday (Sunday) around 8 p.m. (1900 GMT) it was reported
that there was a very loud explosion in (village of) Konduga. On
reaching the scene of the incident we found there was a lot of
casualties. In fact the death toll was over 30 and the injured
over 42," an emergency service official told Reuters.
Earlier the village head, Bulama Kalli, said three suicide
bombers had taken part in the attack, targeting a place where
villagers had gathered to watch a soccer match on a large
screen. Most of those killed have now been buried while several
survivors are still in hospital in Maiduguri, Kalli said.
The military did not respond to a request for comment.
Boko Haram regards soccer - often watched by Nigerians while
drinking beer - as un-Islamic and a demonstration of corrupting
Western influence.
Konduga is located some 25 km (15 miles) from Maiduguri, the
state capital of Borno state.
Buhari's spokesman said the president had called for
security measures to be put in place at open air screenings.
"He urges security agents to sustain surveillance in all
theatres of security challenges in the country, taking into
consideration the unconventional methods deployed by terrorists
to harm innocent and unsuspecting victims," spokesman Femi
Adesina said in the statement.
Buhari began his second four-year term last month after
winning an election in February in which he promised to improve
security in Nigeria.
Nigeria's government says Boko Haram and the rival Islamic
State West Africa Province group have been largely defeated -
that is, driven out of territory they once held - but they
continue to launch attacks on civilian and military targets.
"The Nigerian authorities must do more to protect civilians,
especially in areas like Konduga that have frequently been
targeted by Boko Haram," Amnesty International said in a
statement.