NEW: Former UK Prime Minister Boris Johnson claims a listening device was found in his bathroom after it was used by Israeli PM Benjamin Netanyahu. Johnson claims his security team found bugging devices in the toilets after they were used by Netanyahu. Johnson says Netanyahu excused himself to use the bathroom, which Johnson says existed within a "secret annex." "Thither Bibi repaired for a while, and it may or may not be a coincidence but I am told that later, when they were doing a regular sweep for bugs, they found a listening device in the thunderbox," Johnson says in his new book. As reported by the Telegraph, around the same time, Israel was accused of planting listening devices in the White House. "According to US officials, Washington concluded that Israel was likely behind the placement of cellphone surveillance devices that were found near the White House and other sensitive locations around the capital," the Telegraph reported.