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to step up their guard, a South Korean Joint Chiefs of Staff official said. He also declined to be named, citing office rules.
• There was no immediate comment from communist North Korea's state-run media.
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• CARACAS, Venezuela (AP) -- On the streets of Venezuela's capital, six people explain their choices to vote for either President Hugo Chavez or his challenger Henrique Capriles on Sunday:
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• GUSTAVO CHOURIO, 54
• From underneath a bridge, Gustavo Chourio sells used books and promotes the president's bid for re-election with posters plastered on a concrete wall nearby.
• Government workers recently replaced the closet-sized kiosk Chourio used to sell his books and replaced it, along with dozens of others underneath the same bridge, with larger concrete and reinforced steel structures.
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• ANKARA, Turkey (AP) -- Another mortar shell from Syria struck Turkish territory on Saturday, prompting a fourth straight day of retaliatory artillery fire, and reviving fears that the crisis in Syria could spiral into a regional conflict.
• The latest shelling comes a day after Turkish Prime Minister Recep Tayyip Erdogan called on Syria not to test Turkey's "limits and determination" and insisted that his country "was not bluffing" with its warnings.
• The mortar landed in a rural area near the village of Guvecci, early on Saturday morning just minutes after intense fighting broke out across the border in Syria's Idlib province, between Syrian rebels and the forces of President Bashar Assad's regime, the private Dogan news agency reported.
• No one was hurt by the mortar, which landed some 50 meters (yards) inside Turkish soil and some 700 meters (yards) away from the village, said a statement from the office of the governor for Turkey's border province of Hatay. An army unit based near Guvecci promptly responded, firing four 81-mm mortars, it said.

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