Italy on Tuesday rushed its junior foreign minister to India amid a deepening row over the arrest of two Italian Naval guards who now plan to ask the Kerala High Court to quash the FIR charging them with the killing of two Indian fishermen at sea. 

Staffan De Mistura will "continue on a political level the action so far carried out by a delegation of experts from the Italian foreign, defense and justice ministries," the Italian foreign ministry said in a statement in Rome while announcing the visit. 

The statement also said that Foreign Minister Giulio Terzi will visit India next Tuesday. 

The petition by the two marines — Massimiliano Latorre and Salvatore Girone — was likely to be filed in the High Court Wednesday, a counsel representing them told PTI in Kochi. 

It had not yet been decided on whose behalf — government or any other party — the petition would be filed, the counsel, who did not want to be named, said. 

The marines contend that Kerala police have no authority to investigate the case and courts in India have no jurisdiction as the incident occurred beyond the Indian territorial waters, the counsel said. 

Dora Valentine, the wife of the deceased fisherman, Valentine, 45, and her two children V. Derick and V. Jeen have filed a petition in the High Court seeking Rs. 10 million in compensation. 

In another petition, the captain and owner of Enrica Lexie has filed a caveat before the High Court seeking to hear them before passing any order with regard to compensation to the families of the two fishermen killed.