Antalya, Nov 15 (PTI) Joining a clarion call for action against terror, Prime Minister Narendra Modi today sought a united global effort to combat terrorism while US President Barack Obama vowed to "redouble" efforts to wipe out ISIS.

Obama also said that the US will stand by France in hunting down the Paris attackers while several world leaders also made a strong call for attending the upcoming Climate Summit in the French capital, which faced its deadliest ever terror attack on Friday night wherein at least 129 were killed and hundreds other were injured.

The leaders from the world's 20 top economies have congregated in this Turkish coastal resort town for the two-day G20 Summit beginning today.

Strongly condemning the Paris attacks, which have been owned by ISIS, Modi made a case for united global effort to combat the menace of terrorism.

"We stand united in strongly condemning the dreadful acts of terrorism in Paris... The entire humanity must stand together as one against terrorism. The need for a united global effort to combat terrorism has never been more urgent," he said at the meeting of the BRICS leaders on the sidelines of the G20 Summit.

Combating terrorism must also be a priority for BRICS nations, Modi said.

"We express deepest sympathy and support to Russia for the loss of life in Sinai. Ankara and Beirut are also reminders of terror's growing spread and impact," he added.

After a meeting with Turkish President Recep Tayyip Erdogan, Obama said the two leaders agreed to show solidarity with France in tracking down the perpetrators of the Paris assaults and to boost the campaign to "eliminate" the Islamic State group.

As the Summit got underway, a suspected ISIS jihadist blew himself up in south-eastern Turkey near the Syrian border during a police raid. Five police officers were injured.

Earlier on Saturday, four suspected IS militants were shot dead by the army when they approached an army checkpoint in Gaziantep. Besides, police arrested seven suspected IS members in Turkish capital Ankara, local media reports said.

Turkey has scaled up its hunt for ISIS members ever since a series of deadly attacks including bombings took place in Ankara on October 10, killing 107 people.

Welcoming the world leaders for the G20 Summit, Erdogan asked them to send "very strong, tough" message against terror. .