Turkey, which is already hosting 3.5 million Syrian refugees, is warning against such an attack, fearing it could force more Syrians over the border.
Turkey on Thursday called for Washington "to assess who its real allies in the region are" as the Assad regime in Syria is reported to be preparing an attack on the country's northwestern Idlib province.
The UN has warned that such an offensive would lead to the "worst humanitarian catastrophe in the 21st century".
Turkey however backs opposition fighters seeking the ouster of the Syrian leader, and has said a large-scale offensive against the rebels could trigger a mass exodus towards its border.
The arms supplies have come following Turkey's recent summit meeting with Russian Federation and Iran, who are backing Syria's attempt to retake the region, according to Channel News Asia, which reported the officials' comments.
Cavusoglu on Friday said Turkey was ready to cooperate with anyone in the fight against terror groups in Syria, but criticised the Damascus regime for using the presence of jihadists groups to legitimise a possible operation in Idlib.
Idlib's most powerful armed faction is the Hayat Tahrir al-Sham (HTS) jihadist group, which Ankara officially designated a "terrorist" group last month.