JAKARTA (AFP) - Indonesia’s anti-graft agency has arrested the head of the country’s largest Islamic-based party, which is part of the coalition government, on suspicion of corruption, its spokesman said Thursday. The Corruption Eradication Commission (KPK) said Prosperous Justice Party (PKS) chairman Luthfi Hasan Ishaaq allegedly accepted a sum of one billion rupiah ($102,000) from meat importer PT Indoguna Utama to secure a government contract. After questioning him since late Wednesday, “KPK investigators have formally detained” him on Thursday night, KPK spokesman Johan Budi told reporters.