No evidence has reportedly been found so far against Mossack Fonseca — the Panama-based law firm that is at the centre of a global tax evasion scandal, dubbed the "Panama Papers." A 27-hour raid at the firm ended Wednesday with authorities seizing several digital files, but no arrests have been made yet. 

The public prosecutor against organised crime who ordered a raid at the firm's office this week said there was no proof yet to take action against it. "Right now we don't have any strong evidence allowing us to take any sort of decision," prosecutor Javier Caraballo said, according to AFP. 

Reuters reported authorities were analysing 100 "virtual servers" of Mossack Fonseca that has been storing the firm's records over the last 40 years. Nearly 11.5 million documents of the firm had been revealed in the biggest such leak in history, which highlighted names of several world leaders whose family members held offshore assets, including British Prime Minister David Cameron, Chinese President Xi Jinping, and former Icelandic Prime Minister Sigmundur Davíð Gunnlaugsson who was forced to step down following national anger. 

"The information we have collected is what will permit us to have evidence to take a decision later on," Caraballo said.

The firm has maintained it is not involved in any wrong-doing, after the "Panama Papers" scandal erupted last week. In fact, Mossack Fonseca said, "We're the ones against whom a crime has been committed," in a statement Wednesday. 

"Our systems having been unlawfully breached by parties external to the firm. As we've always done over nearly 40 years of doing business, we stand ready, willing and eager to cooperate with authorities again on their latest investigations to ensure this situation is brought to a just conclusion," the law firm said.