The party unit has lodged an FIR with police in this regard.
Incharge of BJP's Junagadh office Raju Jivani said he came to know about the incident this morning.
"As soon as I reached office, our IT cell employees told me that someone has hacked our website www.bjpjunagadh.org and uploaded photographs and comments to malign reputation of BJP, RSS and Narendra Modi," said Jivani, adding that he informed the IT cell head Sanjay Manvar about the issue.
Jivani said in one morphed photograph, Modi and other BJP leaders can be seen burning the tricolour. "In another photograph, they are standing on the tricolour," he said.
Jivani said he had saved these images as a proof and informed party high command about the hacking.
"In total, there were seven such pages having morphed photographs depicting Modi and BJP in bad light. The hacker had also written derogatory remarks about BJP, Modi and RSS on our website," said Jivani.
He said he lodged a complaint against unknown hacker(s) for trying to malign reputation of BJP and the party leaders.
"After discussing the issue with party leaders, I lodged a complaint with 'B' division police against the hacker for trying to malign the reputation of our leaders and party," Jivani said.
The IT Cell has removed the pages from the website, Manvar said.