"Due to the corrupt practices going on, there is a question mark on the people engaged in public service. All political leaders will have to take the lead to set this right," he told a meeting of political parties ahead of Parliament session beginning on Monday.
"I urge all the political leaders to stay away from corrupt politicians and refrain themselves from protecting them from the investigation against them," Parliamentary Affairs Minister Ananthkumar quoted Modi as saying.
The Prime Minister also urged the political leaders to help carry forward the investigation against corrupt politicians.
The all-party meet was held at Parliament House.
Lalu Prasad and his son-cum-Bihar Deputy Prime Minister Tejashwi Yadav have denied the charges of corruption hurled at them and accused the BJP of "vendetta politics".
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