Turkey Is Adding to Pressure on Damascus

ISTANBUL—Turkey said on Tuesday that it would hold military exercises close to the Syrian border and that Prime Minister Recep Tayyip Erdogan would disclose steps to be taken against Damascus when he visits refugee camps in the area in the coming days.

The moves came as Col. Riad al As'ad, a former Syrian military officer, reported to have been detained by Turkey and handed over to Damascus, surfaced in Turkey and denied the...