BOGOTA, Colombia -- Suspected leftist rebels posing as tourists planted two bombs that ripped through hotel rooms late on Tuesday in the coastal Colombian city of Santa Marta, killing one person and injuring five others, police said. The first bomb exploded in a hotel room in the city center, about 620 miles (1,000km) north of Bogota. That blast injured four people. Another hotel attack followed on Santa Marta's outskirts, killing one person and injuring another. Police said that in both cases the bombers checked into hotel rooms as tourists, planted the explosives and exited the buildings before the bombs detonated,...