Israel has expanded its military capabilities to locate three Israeli teenagers kidnapped in the West Bank last week. 

Israel is blaming the kidnappings on the Islamist militant group Hamas, according to The Financial Times. 

The three Israeli students -- Gilad Shaar, 16, Naftali Fraenkel, 16, and Eyal Yifrach, 19 -- went missing June 12. They were last seen hitchhiking near the Jewish settlement of Gush Etzion on a highway used by both Palestinians and Jewish settlers.  

The search, the largest military operation in the West Bank in a decade, is centered around Hebron, the biggest city in the West Bank. Israeli Defense Forces members have also raided houses of suspected militants, as well as television offices supposedly connected to Hamas in the cities of Jenin, Ramallah and Nablus.

Israel claimed to have detained 25 people Friday, raising to 300 the number of people detained since the operation began. Israel says about two-thirds of the detainees are members of Hamas. IDF's Skylark drones are tracking the raids' progress. 

The operation, "Brother's Keeper," has involved the deployment of nine military brigades. Israeli troops conducted a similar large-scale operation during the Palestinian uprising in 2000 to 2005. 

The hunt to find the missing teens is accompanied by Israeli airstrikes on Hamas rocket launchers and infrastructure. 

Israeli forces also rearrested 51 former Palestinian prisoners released in 2011 in exchange for Gilad Shalit, an Israeli soldier held captive in Gaza by Hamas for five years. 

Israeli Prime Minister Benjamin Netanyahu attributed the kidnapping to Hamas, but neither the IDF nor the government has provided evidence for that. 

The kidnapping comes two weeks after Hamas entered into a unity government with Fatah and the Palestinian Authority, led by Mahmoud Abbas. 

Fatah leader Kifah Awiwi doubts Hamas kidnapped the teens. 

"Hamas said they are not taking any credit," Awiwi said. "For Hamas, reconciliation was their saviour; why would they do something like this?"

Awiwi said other Islamist groups, such as Salafists, could be responsible. 

The IDF's main mission is to find the missing students, bring their abductors to justice and push back against Hamas. The Israeli military says it will continue the military offensive even after it finds the students. 

The Israeli government was angered by Fatah's reconcilitation with Hamas, which most Western nations consider a terrorist organization. 

"Let no one think they can kidnap or hurt our children and get away with it," Yair Lapid, finance minister and head of the center-right Yesh Atid party, told The Financial Times. 

The kidnapping has shocked Israel, which has a low crime rate, and has dominated Israeli media. The EU, U.S. and UK have condemned the abduction, which has also sparked a Twitter campaign similar to the one for the abducted Nigerian girls, using hashtags "#BringBackOurBoys" and "#EyalGiladNaftali."

Mahmoud Abbas condemned the abduction Wednesday at the Organization of Islamic Cooperation meeting in Jidda, Saudi Arabia. 

"They are human beings, and we are looking for them and we will hold their kidnappers accountable, whoever they are," he said.

While Hamas has criticized the Palestinian Authority's negotiations with Israel, Abbas defended the coordination, saying it is "in our interest and for our protection."

According to The New York Times, Western diplomats, including Secretary of State John Kerry, have condemned the abductions, but did not withdraw support for the unity government. However, Western leaders are skeptical about Hamas' supposed new commitment to nonviolence. 

"There can't be genuine reconciliation if that reconciliation is not accompanied by a clarity from Hamas around the use of violence," said former British Prime Minister Tony Blair, envoy for the Middle East peacemakers.