WRAPUP 12-Russia halts grain deal in what UN calls blow to needy people everywhere

(Adds Zelenskiy quotes, Russian news agency reports partial road traffic restored on bridge to Crimea, paragraphs 13, 19)

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UN chief expresses deep concern on grains pact

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Two parents dead, girl injured in attack on Crimea bridge

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Ukraine says Russian forces on offensive in northeast

KYIV, July 17 (Reuters) - Russia halted participation on Monday in the year-old U.N.-brokered deal that lets Ukraine export grain through the Black Sea, causing concern in poorer countries that price rises will put food out of reach.

Hours earlier, a blast knocked out Russia's bridge to Crimea in what Moscow called a strike by Ukrainian sea drones, killing two people. Moscow said it was a terrorist attack on the road bridge, a major artery for Russian troops fighting in Ukraine.

The Kremlin said there was no link between the attack and its decision to suspend the grain deal, over what it called a failure to meet its demands to implement a parallel agreement easing rules for its own food and fertilizer exports.

"Unfortunately, the part of these Black Sea agreements concerning Russia has not been implemented so far, so its effect is terminated," Kremlin spokesman Dmitry Peskov told reporters.

U.N. Secretary-General Antonio Guterres signalled that Russia's withdrawal meant that the related pact to assist Russia's grain and fertilizer exports was also terminated.

"Today's decision by the Russian Federation will strike a blow to people in need everywhere," he told reporters.

Moscow said it would consider rejoining the grain deal if it saw "concrete results" on its demands but that its guarantees for the safety of navigation would meanwhile be revoked.

In Washington, the White House said Russia's suspension of the pact "will worsen food security and harm millions" and U.S. Secretary of State Antony Blinken called it unconscionable.

IMPACT COULD BE PROFOUND IN AFRICA

Ukraine and Russia are some of the world's biggest exporters of grain and other foodstuffs and any interruption could drive up food prices across the globe.

Shashwat Saraf, the emergency director in East Africa for the International Rescue Committee (IRC), said the impact would be profound in Somalia, Ethiopia and Kenya, which have been facing the Horn of Africa's worst drought in decades.

"I don't know how we will survive," said Halima Hussein, a mother of five living in a crowded camp in Somalia's capital Mogadishu for people displaced by years of failed rains and violence.

Ukraine's President Volodymyr Zelenskiy raised the prospect of resuming grain exports without Russia's participation, suggesting Kyiv would seek Turkey's support to effectively negate the Russian de facto blockade imposed last year.