JERUSALEM (AP) — A senior Jordanian official says that his country has foiled a “malicious plot” that threatened to destabilize the kingdom. Foreign Minister Ayman Safadi spoke at a news conference Sunday, a day after a half brother of King Abdullah II was placed under house arrest. Safadi said Jordanian intelligence had intercepted certain communications at what he called the “zero hour.” He says it then “was clear they moved from design and planning into action.” He says almost 20 people are under arrest. The unprecedented incident has raised concerns about stability in a country seen as a key Western ally in a volatile region, and drawn an outpouring of support for Abdullah.