According to the report, Mashaal, who arrived in Khartoum on Tuesday, did not elaborate on the type of arms produced or the suppliers of weapons.
In May, foreign media outlets reported an Israeli air strike in January on a convoy of trucks in Sudan, which was carrying weapons bound for Gaza.
American news station ABC reported at the time that the airstrike that destroyed the trucks and killed at least 39 people was not an isolated incident, but was rather one of at least three attacks. According to the report, a US official told the station that two of the strikes took place in the Sudan, while a third occurred in the Red Sea.
Israel has yet to offer an official response to the allegations.