What was behind the "Syrian army's state of alert" on Tuesday?

Same day, same topic

• 23:44 Al-Ikhbariya (alikhbariah.com) Jazeera Airways launches its first direct flights between Kuwait and Deir ez-Zor today source ↗
• 23:42 SANA (TG) The launch of the first Jazeera Airways flights from Kuwait to Deir Ezzor strengthens its connection to its Arab surroundings. source ↗
• 23:13 Google News keyword: al-Souri (AR) Syria.. Suspicion of masked men ends in a clash and thwarting a bombing in the Sayyidah Zainab area source ↗
• 22:24 Al-Ikhbariya (alikhbariah.com) Quneitra: Israeli occupation arrests a young man during raids in Jabat al-Khashab source ↗
• 22:00 Aleppo Today (Facebook) Al-Ikhbariya: Israeli occupation forces detain a young man during a raid on a number of homes on the outskirts of the town of Jubata al-Khashab in the northern… source ↗
• 21:53 Arabi21 Yemeni Information Minister threatens "Al-Houthi" with a military operation similar to "Deterring Aggression" against Assad source ↗
• 21:53 Arabi21 Yemeni Information Minister threatens the Houthi with a military operation similar to "Deterring Aggression" against al-Assad source ↗
• 21:50 SOHR (syriahr.com) Clash with an armed group in Sayyidah Zainab amid reports of casualties source ↗
• 21:45 SANA (English) Al-Saleh: Jaramana bombing will not deter Syrians from continuing reconstruction source ↗
• 21:45 SANA (English) Internal Security Forces neutralize two ISIS militants planting IED in Sayyidah Zaynab source ↗