"The Govt, which is taking credit for the bravery of our Armed Forces, is headed by the same man who insulted the Army when in Opposition," the party tweeted.
It posted a purported tweet by Modi when he was the Gujarat Chief Minister on its twitter handle which read, "We are facing many a crisis. Is all this happening due to weakness of our Army:Narendra Modi (sic)."
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In the picture containing the tweet, Congress alleged that Modi even targeted the Army to grab power.
"In 2008, Modi ji touched a new low - instead of showing solidarity with forces, he held a press conference at attack site & cursed the Govt (sic)," it said in another tweet.
The tweet accompanied a picture that showed Modi addressing media in Mumbai in the wake of the 26/11 terror strikes.
Congress said the Modi government "insulted the sacrifices" of martyrs "by inviting the ISI to probe the Pathankot terror attack".
BJP chief Amit Shah had on Friday launched a blistering attack on Rahul for his 'dalali' remarks, saying he "crossed all limits" and "insulted" the army's valour.
The Congress Vice President had on Thursday accused the prime minister of "hiding behind the blood of soldiers" and politically exploiting their sacrifices.