Israeli intelligence officials have assessed that the US only has enough firepower in the Middle East to carry out four or five days of intense airstrikes on Iran, according to a report in the UK’s Financial Times on Tuesday.

The assessment comes despite the fact that the US has deployed the most firepower in the region since the 2003 Iraq invasion.

According to an Israeli intelligence source quoted in the report, the US could sustain a week of “lower-intensity strikes.”