Jacky Rowland, Al Jazeera's correspondent in Jerusalem, said: "All that Israel has said is that it did not carry out a military attack against Syria."
She said: "This has been a summer of heightening tensions between Israel and Syria, certainly in terms of rhetoric and talk ... this flurry of allegations and denials won't have helped."
Intrusion claim
A Syrian army spokesman told the official Sana news agency: "Enemy Israeli planes penetrated Syrian air space from the Mediterranean Sea heading towards the northeast, breaking the sound barrier."
He said: "Our air defences forced them to leave ... without causing human or material loss."
"What are they going to do with about $30m of armaments except attack neighbouring countries?" Buthayaa Shaaban,
Syrian government minister "We warn the Israeli enemy government against this flagrant aggressive act, and retain the right to respond in an appropriate way," he said. "We warn the Israeli enemy government against this flagrant aggressive act, and retain the right to respond in an appropriate way," he said.
"Air defence units confronted them and forced them to leave after they dropped some ammunition in deserted areas without causing any human or material damage."
But asked by Al Jazeera if the Israeli jets had attacked targets in Syria, Buthayaa Shaaban, a Syrian government minister, would only confirm that the Israelis "intervened in our airspace".
She said: "The Israeli aeroplanes went into our airspace at night on our northern borders and this is not really surprising. What are they going to do with about $30m of armaments except attack neighbouring countries?"
She said that Syria was still looking into the "ammunition" that the Israeli jets are alleged to have dropped.
Long hostilities
At the beginning of last summer's war against Hezbollah in Lebanon, Israeli aircraft flew over the palace of Bashar al-Assad, the Syrian president, in what analysts called a warning to Damascus.
In June of the same year, Israeli jets also flew over al-Assad's summer home in the coastal city of Latakia, after Syrian-backed Palestinian fighters in Gaza captured a young Israeli soldier.
Syria and Israel remain technically at a state of war.
Peace talks broke down in 2000 over the fate of the Israeli-occupied Golan Heights.
Syria has fired on Israeli fighter jets after they claim that the planes entered Syrian territory "dropping ammunition" and traveling at the speed of sound.

"Air defense units confronted them and forced them to leave after they dropped some ammunition in deserted areas without causing any human or material damage. We warn the Israeli enemy government against this flagrant aggressive act, and retain the right to respond in an appropriate way," said a spokesman for the Syrian military force.

Israel has neither confirmed or denied the reports, simply stating that "we cannot discuss military operations." Past Israeli military operations into Syrian airspace have been confirmed by the Israeli military, such as the circling of Syrian President Bashar Assad's compound in 2006. 

Israel, in the past, would fly over Lebanon and Turkey to perform training exercises and have at times traveled at the speed of sound. The last reported Israeli fighter planes to fly into Syria was in 2006 after an Israeli soldier had been kidnapped. They also flew into Syria just before the armed conflict with Hezbollah in Lebanon had begun.

Syria has said that no targets were hit and that no one was injured in the incident.