David Cameron has urged Israel to pursue a peace deal with Palestinians that could mean "an end of all conflict" in the Middle East.
Israel says it has has intercepted a "monstrous cargo" of weapons on a cargo ship heading to Gaza from Iran.
ITV News Correspondent Geraint Vincent explains why Israel's alleged attack at the Lebanese-Syria border may not create new conflict.
Israeli warplanes struck a target in eastern Lebanon near the border with Syria on Monday, security sources told Reuters.
It was not immediately known what the target was or the exact location of the air strike, which occurred in a mountainous area near the border.
The Israeli army declined to comment but an Israeli security source confirmed that there has been "unusually intense air force activity in the north", referring to Lebanon.
Israeli airstrikes, believed to target Hezbollah posts or shipments, have been reported at the Lebanese-Syria border.
According to local reports, the two strikes seem to be in Syria's territory.
The Prime Minister has cancelled his trip to Israel and Palestine scheduled for next week.
In a press conference David Cameron said: "Nothing is more important than dealing with these floods."
There are concerns that US attempts at restarting peace talks in the Middle East have been hindered by a small number of Jewish extremists.
Attacks on Palestinians living in the West Bank have quadrupled in the past eight years, according to the United Nations.
ITV News' Middle East correspondent Geraint Vincent reports from Qusra, in northern the West Bank:
The US State Department has described remarks said to have been made by Israel's defence minister about John Kerry as "offensive and inappropriate".
Moshe Yaalon reportedly denounced Secretary of State John Kerry's quest for Israeli-Palestinian peace as "messianic" and "obsessive".
"The only thing that can save us is if Kerry wins the Nobel prize and leaves us alone," he was quoted as saying by the newspaper Yedioth Ahronoth.
US State Department spokeswoman Jen Psaki said that if accurate, Mr Yaalon's remarks were "offensive and inappropriate, especially given all that the United States is doing to support Israel's security needs".
The defence minister, who stopped short of denying he had made the attack on Kerry, later described the US as an ally of utmost importance.
Former Israeli Prime Minister Ariel Sharon has been buried at his family ranch in the Negev desert, beside his late wife.
In the second of two funeral services held today, Sharon's sons Gilad and Omri Sharon, as well as Israel's Military Chief Benny Gantz, paid tribute to the statesman.
Earlier, former British Prime Minister Tony Blair and US vice president Joe Biden paid homage to Mr Sharon at his state funeral service in Jerusalem.
Mr Sharon died at the age of 85 on Saturday after spending the last eight years in a coma caused by a stroke.
Former British Prime Minister Tony Blair and US vice president Joe Biden have paid homage to Ariel Sharon at his state funeral service in Jerusalem.
Speaking at the state memorial service in the southern Negev desert, former Prime Minister Tony Blair paid tribute to Ariel Sharon's "idea that the Jewish people, so often victims of injustice and persecution, should have a state where they could be independent and free."
"Think good or ill of Arik Sharon, agree or disagree with him, but that calling - a noble one - was plain and unalloyed," he said.
Sharon, he added, was "a warrior to create his country, yet wise enough to know that war alone could not secure his future."
"He was a giant of this land."
The Israeli Ministry of Defence has shared this picture on Instagram of Ariel Sharon's final resting place.
The former Israeli prime minister will be buried next to his late wife Lily, spokesman Ofir Gendelman said.