Belgian prosecutors say five of seven suspects arrested over the weekend have been released and that custody of two other suspects still to be decided.

BREAKING: New Islamic State video warns countries taking part in Syria airstrikes, they will suffer France's fate, threatens attack in Washington.

Ground operation in Syria not discussed at G20 summit - Turkish foreign minister

World leaders meeting at a G20 summit in Turkey did not discuss the possibility of a military ground operation in Syria and Turkey is not planning to launch any such offensive itself, its foreign minister said on Monday.

Feridun Sinirlioglu said new security measures would be taken against Islamic State, but did got give details, and said Turkey had been sharing intelligence with its allies in the wake of Friday's attacks claimed by the jihadist group in Paris.

He also said the prospect of Syrian President Bashar al-Assad standing in any election in Syria was "not an option".

(Reporting by Asli Kandemir; Writing by Nick Tattersall; Editing by Humeyra Pamuk)

EU countries plan crackdown on firearms after Paris attacks

The European Union plans to tighten rules governing the issue and use of guns, EU officials said after interior ministers were summoned to a crisis meeting in Brussels following the deadly attacks by armed militants in Paris.

Ministers, who will meet on Friday, will try to push through quickly rules aimed at making it more difficult to acquire weapons and to track them better - possibly marking firearms with serial numbers - and do more to ensure that guns de-activated for sale as collectors items cannot be fired again.

Firearms can be de-activated so that they can no longer be used for lethal action. But loopholes and different national legislation among EU members can be exploited allowing for weapons, though to be out of use, to be re-activated.

This is particularly pressing because of evidence that the January attack on French magazine Charlie Hebdo was carried out with Kalashnikov rifles that had previously been decommissioned for legal sale, EU officials say.

The European Commission, the EU executive, has been working since 2013 on new rules for common minimum standards across the EU on deactivation of weapons, and on a review of existing legislation on firearms to "reduce the legal uncertainty caused by national divergences", an EU official said.

"Work on this is now being significantly accelerated," a Commission spokeswoman told a news briefing on Monday.

As weapons can be brought into Europe from neighbouring countries, ministers on Friday will address ways of strengthening checks at the external borders of the passport-free Schengen area, which includes most EU nations.

Schengen's practice of open borders is already under strain from the chaotic flow of migrants from the Middle East.

EU countries also plan to speed up talks to reach an agreement on sharing travellers' data that has been long opposed by EU lawmakers on the grounds it would infringe people's privacy.

EU negotiators will meet on Tuesday to break a stalemate between national governments and the European Parliament on the issue, but it is unclear whether there will be progress.

(Editing by Alastair Macdonald and Richard Balmforth)

UPDATE: Obama says much of G20 focused on Paris attacks.

Obama says the events in Paris were terrible and sickening setback in fight against Islamic State but progress is being made.

Obama says Islamic State leaders will have no safe haven anywhere, as shown in Libya.

Obama says begun to see some modest progress on diplomatic front on Syria.

Obama says "we have the right strategy and we're going to see it through"

Obama says after Paris attacks, on military front we are continuing to accelerate what we do as we find additional partners on the ground.

BREAKING: Egyptian security forces kill 24 Islamic State affiliated militants in central Sinai, 70 km from crash site of Russian plane: security sources