从国际船讯网的船舶航迹信息和商业卫星图像来看，自5月下旬到现在，菲律宾海岸警卫队最大的日本提供的2600吨级的“特蕾莎·马格巴努阿”号海警船持续在中国南海仙宾礁潟湖一带活动。    Israel has blamed Palestinian Islamic Jihad for a deadly blast at a hospital in Gaza City Tuesday night.Hundreds of people were reported killed in the explosion at al-Ahli Hospital in Gaza City, which the Israel Defense Forces said was caused by a failed rocket launch by the group. Two U.S. officials also told ABC News the Pentagon independently concluded the blast was likely caused by an errant Palestinian Islamic Jihad rocket that fell short of its target.Palestinian officials meanwhile are claiming it was the result of an Israeli airstrike.Like Hamas, Palestinian Islamic Jihad is a Gaza militant group involved in the conflict and has claimed to have taken Israelis hostages. Here's what to know about the group.

What is Islamic Jihad?

Palestinian Islamic Jihad was formed in the 1980s in response to Israel's occupation of Gaza. The radical Islamist movement was founded by Palestinian Fathi Shaqaqi, who was assassinated in 1995, and inspired by the Iranian revolution.Since its founding, the armed group has grown to be the second-largest militant group in the Gaza Strip and receives support from Iran, Syria and the Lebanese militant group Hezbollah, according to the U.S. government's National Counterterrorism Center.The group is "committed to the destruction of Israel," and its military wing, al-Quds Brigades, "has been responsible for many attacks on Israeli targets since the 1990s," the National Counterterrorism Center said.

Islamic Jihad vs. Hamas

Both Islamic Jihad and Hamas are militant groups operating in Gaza that are united in their resistance against Israel. Both are also funded by and have close ties to Iran, though function independently, according to the Council on Foreign Relations, a New York City-based independent think tank.Like Hamas, Islamic Jihad has been designated a foreign terrorist organization by the U.S. and the European Union. Islamic Jihad, the smaller of the two, is considered to be more extreme and is singularly devoted to fighting Israel, while Hamas also has sociopolitical functions as the governing body of Gaza.Islamic Jihad's popularity has declined in Gaza over its military confrontations and past failed rocket launches, which have resulted in Palestinian casualties, according to the Middle East Institute, a Washington, D.C.-based non-partisan think tank. At the same time, its profile in the West Bank has risen, "in part for attempting to link Gaza to the West Bank but also for its willingness to stand up to Israel, despite taking severe hits," the institute said last year.。

菲律宾媒体声称，最近发现至少1艘中国军舰、直升机以及4艘海警船在仙宾礁附近停留，并且还发现中国在仙宾礁附近倾倒了碎珊瑚，好像是在做开垦的准备活动，在这个礁盘的顶部建造海洋结构特征。并且菲方称，接下来几个月很可能会看到中国在仙宾礁附近建造人工岛。

二 | 菲律宾海岸警卫队一共派出了3艘船轮流进行所谓的“监视”。

这个仙宾礁是南沙群岛当中面积最大的三个礁盘之一，位于中国造岛成功的美济礁东南大约100公里的地方。这是一个由30多个礁块组成的礁盘，礁体长度大约有23公里，宽度有7公里，礁盘面积加起来有118平方公里，中间的潟湖平均水深3到18米。

填海造岛的难度相对来说确实比较低，美济礁的面积只有46平方公里，如果在仙宾礁进行吹沙填海，造出来的仙宾礁人工岛的面积一定是非常可观的。

三 | 但现在的问题是，菲律宾方面声称中国将要在仙宾礁造岛，那是捕风捉影，而菲律宾倒有可能故伎重演，用破船“坐滩”或在仙宾礁潟湖内构筑建筑物的方式再次抢占中国的岛礁。菲律宾的行为已经出现了这个倾向。

从4月27日到5月6日，菲律宾“特蕾莎·马格巴努阿”船在仙宾礁潟湖内航行了一个正方形的航线。

四 | 要知道这种航线通常只有在进行海洋勘探类作业的时候才会出现。

五 | 仙宾礁潟湖的3到18米水深比仁爱礁的平均水深更浅，吃水较深的船很容易在这个潟湖内“坐滩”。

中方有理由怀疑菲方会不会在仙宾礁故伎重施，以让退役舰船非法“坐滩”的方式搞出个第二起仁爱礁事件呢？“特蕾莎·马格巴努阿”号船的疑似勘探作业的活动或是在为此做准备，该舰正试图在仙宾礁潟湖内找到合适的船只“坐滩”搁浅的位置。当然中国不会对菲方的鬼鬼祟祟置若罔闻。

从商业卫星照片当中可以看到，在菲律宾“特蕾莎·马格巴努阿”号附近，多艘中国海警船和渔船一直保持在比较近的视距范围内，显然是在密切监视着菲律宾船只的一举一动。

相信只要菲律宾船只一旦轻举妄动，中国海警船和渔船一定会在第一时间内进行现场果断处理。抢滩坐礁的历史事件不可能被再次的重演，但菲律宾人如果一意孤行，下场一定会比水炮冲击来得更为悲惨。