World Bulletin / News Desk

Thai police say they have an idea who was responsible for a spate of bomb attacks Thursday and Friday that killed four people across the country's south and injured over 30.

Police Gen. Pongsapat Pongcharoen told reporters Saturday that "police have strong leads and a good idea" of who was behind the deadly attacks which struck at tourist sites and government offices across five provinces.

"We hope to have good news [about suspects and motives] over the next one or two days," he said. "All relevant agencies are working together to accomplish this."

Pongsapat denied reports that two men had been arrested and detained, saying the reports "lacked credibility".

"We have only witnesses who came in to make statements of their own free will, no person or suspect has so far been detained."