at least four rabbis and wounded six othersin an attack at a Jewish holy place in Jerusalem.Police killed the two attackers.The attack took place at a synagogue in West Jerusalem.The synagogue is in a Jewish neighborhoodwith a large number of Western immigrants.Israeli police identified the dead as Israeliswith double nationality, three Americans and one Briton.An Israeli police spokesman saidthe attackers used knives and a gun.Israeli Prime Minister Benjamin Netanyahuhas promised to strongly answer the attack.He blamed what he called incitementby the militant Palestinian groupHamas and Palestinian Authority President Mahmoud Abbas.Abbas condemned the attack.He said he condemns the killing of civiliansby any and all people.Hamas praised the attack,calling it an answer to continued Israeli crimes.Secretary of State John Kerry sayshe is hopeful the U.S. and five other nationscan reach a deal with Iran on its nuclear program.But he said Tuesday that he will not make any predictions.Negotiators from Iran and the so-called P5+1 groupthat includes the United States, Britain, China,France, Russia and Germanyare meeting again Tuesday in Vienna, Austria.The two sides are trying to reach a dealthat guarantees that Iran's nuclear program is peaceful.They have less than a week to reach an agreementbefore the end of a temporary agreement reached last year.Secretary Kerry called this week's talks "critical."Iranian media reported Foreign Minister Javad Zarif saidTuesday that a deal is still possible.He reportedly warned the international sideto not make "excessive demands" of Iran.Ukraine's military is preparing for a possible Russian-backed rebel attack. Recent reports have said Russian soldiers have been crossing the border into eastern Ukraine.Ukraine's President Petro Poroshenko spoke Monday with the German newspaper Bild. He said that his country is ready for total war.Ukraine's military is increasing its defenses a few kilometers from rebel-held territory in the Luhansk region. Rebels have been firing at the Ukrainian position.Moscow has repeatedly denied directly supporting the rebellion in eastern Ukraine. It says Russian troops fighting alongside pro-Russian separatists are serving as volunteers.The rebels said they fear it is the Ukrainian forces who are planning an offensive.In Brussels, Belgium, NATO Secretary General Jens Stoltenberg has urged Russia to withdraw its troops from Ukraine.The governor of the central U.S. state of Missourihas declared a state of emergency.Jay Nixon made the call as a jury decideswhether a police officer will be chargedin the deadly shooting of an unarmed teenager.Mr. Nixon said the emergency orderrequires the National Guard to assist state security forcesin case of violence in the town of Ferguson.That is where police officer Darren Wilson shotand killed the teenager, Michael Brown.Protests, some violent, have followed the killing.Officials are especially concernedthat a decision in supportof Mr. Wilson could lead to more violence.