"God grant him good health... If a military-grade poison had been used, the man would have died on the spot. Thank God he recovered and that he left (hospital)," Putin said during a press conference with German Chancellor Angela Merkel.
"We have several times offered our British partners any necessary assistance in the investigation (of the poisoning). So far we have received no response. Our offer remains open," he said.
Skripal and his daughter Yulia, who was visiting from Moscow, collapsed on March 4 on a bench in Salisbury, the city in southwestern England where the former double agent lives.
The poisoning sparked a diplomatic crisis that saw Russia and the West expelling dozens of diplomats in tit-for-tat moves.
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