There'll be hell to pay: The world reacts to MH17 crash

Following the news that a Malaysia Airlines Boeing 777 has crashed near the Russian border in eastern Ukraine, here is the response from leaders within the country and around the world.

I am shocked by reports that an MH plane crashed. We are launching an immediate investigation

• Najib Razak, Malaysian prime minister

I'm shocked and saddened by the Malaysian air disaster. Officials from across Whitehall are meeting to establish the facts

• David Cameron, British prime minister

It is a terrible tragedy. Our thoughts and prayers are with all the families, wherever they may call home

• Barack Obama, US president

I am presently in constant touch with prime minister Najib Razak. Foreign minister Anifah Aman and transport minister Liow Tiong Lai also working closely with me

• Hishammudin Hussein, Malaysian defence minister

This is the third tragic incident in recent days after Ukrainian military An-26 and Su-25 jets were shot down from Russian territory.

We don't rule out that this plane was also shot down, and we stress that the Ukrainian military didn't take any actions to destroy targets in the air

Petro Poroshenko, Ukrainian president

The Russian leader informed the US president about information received just before the telephone call from aviation services about the crash of a Malaysian plane over Ukrainian territory

• White House representative

We didn't do it

• Vitaly Churkin, Russian envoy to the UN

The Russians have undoubtedly been supplying the [pro-Russian rebels] with weapons, almost certainly with anti-aircraft weapons, so Russia would very likely be implicated and that would raise the volume of international criticism of Russia

• Sir Tony Brenton, former British ambassador to Russia speaking to the BBC

The portable air defence systems which we have, they work at a maximum of three to four thousand metres. Therefore, it is possible to say virtually before the start of the investigation that the Ukrainian armed forces destroyed this

• Ukrainian separatist spokesman Sergey Kavtaradze

According to initial information, the plane was shot down by Ukrainian air defence. The rebels don't have weapons with which they could shoot down a plane at 10,000 metres

• Aleksandr Borodai, leader of self-declared Donetsk People's Republic

If it is the result of either separatist or Russian actions mistakenly believing that this is a Ukrainian warplane, I think there's going to be hell to pay and there should be

• John McCain, US senator speaking to MSNBC